following would always require a citation in a research paper

• Introduction to Academic Research
• East Tennessee State University
• Citing Sources
• Picking a Topic
• Background Research
• Evaluating Sources
• Primary, Secondary, and Tertiary Sources
• Popular and Scholarly Sources
• Find Articles and Books
• Internet Sources

Citation Help

• MLA Center The Modern Language Association website can help you cite sources in MLA style.
• APA Style Blog The American Psychology Association can help you cite sources in APA style.
• Chicago Manual of Style Use this site to help you site sources in Chicago Manual of Style.
• Purdue's Online Writing Lab (OWL) Purdue's Online Language Writing Lab contains up-to-date information on MLA and APA styles.

Sherrod Library Citation Tools

• Writing and Citation Style Guides and Tools
• APA Style 7th Edition
• Citation Management Tools

Avoiding Plagiarism

• Paraphrase: Write It in Your Own Words
• Patchwriting 
• How to Paraphrase a Source
• What is Common Knowledge?
• How to Avoid Plagiarism and Find Your Own Voice 

Things to Site

Why citation is important, what is citation.

A "citation" is the way you tell your readers that certain material in your work came from another source. It also gives your readers the information necessary to find that source again, including:

• information about the author
• the title of the work
• the name and location of the company that published your copy of the source
• the date your copy was published
• the page numbers of the material you are borrowing

Why should I cite sources?

Giving credit to the original author by citing sources is the only way to use other people's work without plagiarizing. But there are a number of other reasons to cite sources:

• citations are extremely helpful to anyone who wants to find out more about your ideas and where they came from.
• not all sources are good or right -- your own ideas may often be more accurate or interesting than those of your sources. Proper citation will keep you from taking the rap for someone else's bad ideas.
• citing sources shows the amount of research you've done.
• citing sources strengthens your work by lending outside support to your ideas.

Doesn't citing sources make my work seem less original?

Not at all. On the contrary, citing sources actually helps your reader distinguish your ideas from those of your sources. This will actually emphasize the originality of your own work.

When do I need to cite?

Whenever you borrow words or ideas, you need to acknowledge their source. The following situations almost always require citation:

• whenever you use quotes
• whenever you paraphrase
• whenever you use an idea that someone else has already expressed
• whenever you make specific reference to the work of another
• whenever someone else's work has been critical in developing your own ideas.

From: Plagiarism.org   http://www.plagiarism.org/learning_center/what_is_citation.html   Accessed on September 21, 2008.

"The Punishable Perils of Plagiarism" from TED-Ed

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MLA In-Text Citations: The Basics

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MLA (Modern Language Association) style is most commonly used to write papers and cite sources within the liberal arts and humanities. This resource, updated to reflect the MLA Handbook (9 th ed.), offers examples for the general format of MLA research papers, in-text citations, endnotes/footnotes, and the Works Cited page.

Guidelines for referring to the works of others in your text using MLA style are covered throughout the  MLA Handbook  and in chapter 7 of the  MLA Style Manual . Both books provide extensive examples, so it's a good idea to consult them if you want to become even more familiar with MLA guidelines or if you have a particular reference question.

Basic in-text citation rules

In MLA Style, referring to the works of others in your text is done using parenthetical citations . This method involves providing relevant source information in parentheses whenever a sentence uses a quotation or paraphrase. Usually, the simplest way to do this is to put all of the source information in parentheses at the end of the sentence (i.e., just before the period). However, as the examples below will illustrate, there are situations where it makes sense to put the parenthetical elsewhere in the sentence, or even to leave information out.

General Guidelines

• The source information required in a parenthetical citation depends (1) upon the source medium (e.g. print, web, DVD) and (2) upon the source’s entry on the Works Cited page.
• Any source information that you provide in-text must correspond to the source information on the Works Cited page. More specifically, whatever signal word or phrase you provide to your readers in the text must be the first thing that appears on the left-hand margin of the corresponding entry on the Works Cited page.

In-text citations: Author-page style

MLA format follows the author-page method of in-text citation. This means that the author's last name and the page number(s) from which the quotation or paraphrase is taken must appear in the text, and a complete reference should appear on your Works Cited page. The author's name may appear either in the sentence itself or in parentheses following the quotation or paraphrase, but the page number(s) should always appear in the parentheses, not in the text of your sentence. For example:

Both citations in the examples above, (263) and (Wordsworth 263), tell readers that the information in the sentence can be located on page 263 of a work by an author named Wordsworth. If readers want more information about this source, they can turn to the Works Cited page, where, under the name of Wordsworth, they would find the following information:

Wordsworth, William. Lyrical Ballads . Oxford UP, 1967.

In-text citations for print sources with known author

For print sources like books, magazines, scholarly journal articles, and newspapers, provide a signal word or phrase (usually the author’s last name) and a page number. If you provide the signal word/phrase in the sentence, you do not need to include it in the parenthetical citation.

These examples must correspond to an entry that begins with Burke, which will be the first thing that appears on the left-hand margin of an entry on the Works Cited page:

Burke, Kenneth. Language as Symbolic Action: Essays on Life, Literature, and Method . University of California Press, 1966.

In-text citations for print sources by a corporate author

When a source has a corporate author, it is acceptable to use the name of the corporation followed by the page number for the in-text citation. You should also use abbreviations (e.g., nat'l for national) where appropriate, so as to avoid interrupting the flow of reading with overly long parenthetical citations.

In-text citations for sources with non-standard labeling systems

If a source uses a labeling or numbering system other than page numbers, such as a script or poetry, precede the citation with said label. When citing a poem, for instance, the parenthetical would begin with the word “line”, and then the line number or range. For example, the examination of William Blake’s poem “The Tyger” would be cited as such:

The speaker makes an ardent call for the exploration of the connection between the violence of nature and the divinity of creation. “In what distant deeps or skies. / Burnt the fire of thine eyes," they ask in reference to the tiger as they attempt to reconcile their intimidation with their relationship to creationism (lines 5-6).

Longer labels, such as chapters (ch.) and scenes (sc.), should be abbreviated.

In-text citations for print sources with no known author

When a source has no known author, use a shortened title of the work instead of an author name, following these guidelines.

Place the title in quotation marks if it's a short work (such as an article) or italicize it if it's a longer work (e.g. plays, books, television shows, entire Web sites) and provide a page number if it is available.

Titles longer than a standard noun phrase should be shortened into a noun phrase by excluding articles. For example, To the Lighthouse would be shortened to Lighthouse .

If the title cannot be easily shortened into a noun phrase, the title should be cut after the first clause, phrase, or punctuation:

In this example, since the reader does not know the author of the article, an abbreviated title appears in the parenthetical citation, and the full title of the article appears first at the left-hand margin of its respective entry on the Works Cited page. Thus, the writer includes the title in quotation marks as the signal phrase in the parenthetical citation in order to lead the reader directly to the source on the Works Cited page. The Works Cited entry appears as follows:

"The Impact of Global Warming in North America." Global Warming: Early Signs . 1999. www.climatehotmap.org/. Accessed 23 Mar. 2009.

If the title of the work begins with a quotation mark, such as a title that refers to another work, that quote or quoted title can be used as the shortened title. The single quotation marks must be included in the parenthetical, rather than the double quotation.

Parenthetical citations and Works Cited pages, used in conjunction, allow readers to know which sources you consulted in writing your essay, so that they can either verify your interpretation of the sources or use them in their own scholarly work.

Author-page citation for classic and literary works with multiple editions

Page numbers are always required, but additional citation information can help literary scholars, who may have a different edition of a classic work, like Marx and Engels's  The Communist Manifesto . In such cases, give the page number of your edition (making sure the edition is listed in your Works Cited page, of course) followed by a semicolon, and then the appropriate abbreviations for volume (vol.), book (bk.), part (pt.), chapter (ch.), section (sec.), or paragraph (par.). For example:

Author-page citation for works in an anthology, periodical, or collection

When you cite a work that appears inside a larger source (for instance, an article in a periodical or an essay in a collection), cite the author of the  internal source (i.e., the article or essay). For example, to cite Albert Einstein's article "A Brief Outline of the Theory of Relativity," which was published in  Nature  in 1921, you might write something like this:

See also our page on documenting periodicals in the Works Cited .

Citing authors with same last names

Sometimes more information is necessary to identify the source from which a quotation is taken. For instance, if two or more authors have the same last name, provide both authors' first initials (or even the authors' full name if different authors share initials) in your citation. For example:

Citing a work by multiple authors

For a source with two authors, list the authors’ last names in the text or in the parenthetical citation:

Corresponding Works Cited entry:

Best, David, and Sharon Marcus. “Surface Reading: An Introduction.” Representations , vol. 108, no. 1, Fall 2009, pp. 1-21. JSTOR, doi:10.1525/rep.2009.108.1.1

For a source with three or more authors, list only the first author’s last name, and replace the additional names with et al.

Franck, Caroline, et al. “Agricultural Subsidies and the American Obesity Epidemic.” American Journal of Preventative Medicine , vol. 45, no. 3, Sept. 2013, pp. 327-333.

Citing multiple works by the same author

If you cite more than one work by an author, include a shortened title for the particular work from which you are quoting to distinguish it from the others. Put short titles of books in italics and short titles of articles in quotation marks.

Citing two articles by the same author :

Citing two books by the same author :

Additionally, if the author's name is not mentioned in the sentence, format your citation with the author's name followed by a comma, followed by a shortened title of the work, and, when appropriate, the page number(s):

Citing multivolume works

If you cite from different volumes of a multivolume work, always include the volume number followed by a colon. Put a space after the colon, then provide the page number(s). (If you only cite from one volume, provide only the page number in parentheses.)

Citing the Bible

In your first parenthetical citation, you want to make clear which Bible you're using (and underline or italicize the title), as each version varies in its translation, followed by book (do not italicize or underline), chapter, and verse. For example:

If future references employ the same edition of the Bible you’re using, list only the book, chapter, and verse in the parenthetical citation:

John of Patmos echoes this passage when describing his vision (Rev. 4.6-8).

Citing indirect sources

Sometimes you may have to use an indirect source. An indirect source is a source cited within another source. For such indirect quotations, use "qtd. in" to indicate the source you actually consulted. For example:

Note that, in most cases, a responsible researcher will attempt to find the original source, rather than citing an indirect source.

Citing transcripts, plays, or screenplays

Sources that take the form of a dialogue involving two or more participants have special guidelines for their quotation and citation. Each line of dialogue should begin with the speaker's name written in all capitals and indented half an inch. A period follows the name (e.g., JAMES.) . After the period, write the dialogue. Each successive line after the first should receive an additional indentation. When another person begins speaking, start a new line with that person's name indented only half an inch. Repeat this pattern each time the speaker changes. You can include stage directions in the quote if they appear in the original source.

Conclude with a parenthetical that explains where to find the excerpt in the source. Usually, the author and title of the source can be given in a signal phrase before quoting the excerpt, so the concluding parenthetical will often just contain location information like page numbers or act/scene indicators.

Here is an example from O'Neill's  The Iceman Cometh.

WILLIE. (Pleadingly) Give me a drink, Rocky. Harry said it was all right. God, I need a drink.

ROCKY. Den grab it. It's right under your nose.

WILLIE. (Avidly) Thanks. (He takes the bottle with both twitching hands and tilts it to his lips and gulps down the whiskey in big swallows.) (1.1)

Citing non-print or sources from the Internet

With more and more scholarly work published on the Internet, you may have to cite sources you found in digital environments. While many sources on the Internet should not be used for scholarly work (reference the OWL's  Evaluating Sources of Information  resource), some Web sources are perfectly acceptable for research. When creating in-text citations for electronic, film, or Internet sources, remember that your citation must reference the source on your Works Cited page.

Sometimes writers are confused with how to craft parenthetical citations for electronic sources because of the absence of page numbers. However, these sorts of entries often do not require a page number in the parenthetical citation. For electronic and Internet sources, follow the following guidelines:

• Include in the text the first item that appears in the Work Cited entry that corresponds to the citation (e.g. author name, article name, website name, film name).
• Do not provide paragraph numbers or page numbers based on your Web browser’s print preview function.
• Unless you must list the Web site name in the signal phrase in order to get the reader to the appropriate entry, do not include URLs in-text. Only provide partial URLs such as when the name of the site includes, for example, a domain name, like  CNN.com  or  Forbes.com,  as opposed to writing out http://www.cnn.com or http://www.forbes.com.

Miscellaneous non-print sources

Two types of non-print sources you may encounter are films and lectures/presentations:

In the two examples above “Herzog” (a film’s director) and “Yates” (a presentor) lead the reader to the first item in each citation’s respective entry on the Works Cited page:

Herzog, Werner, dir. Fitzcarraldo . Perf. Klaus Kinski. Filmverlag der Autoren, 1982.

Yates, Jane. "Invention in Rhetoric and Composition." Gaps Addressed: Future Work in Rhetoric and Composition, CCCC, Palmer House Hilton, 2002. Address.

Electronic sources

Electronic sources may include web pages and online news or magazine articles:

In the first example (an online magazine article), the writer has chosen not to include the author name in-text; however, two entries from the same author appear in the Works Cited. Thus, the writer includes both the author’s last name and the article title in the parenthetical citation in order to lead the reader to the appropriate entry on the Works Cited page (see below).

In the second example (a web page), a parenthetical citation is not necessary because the page does not list an author, and the title of the article, “MLA Formatting and Style Guide,” is used as a signal phrase within the sentence. If the title of the article was not named in the sentence, an abbreviated version would appear in a parenthetical citation at the end of the sentence. Both corresponding Works Cited entries are as follows:

Taylor, Rumsey. "Fitzcarraldo." Slant , 13 Jun. 2003, www.slantmagazine.com/film/review/fitzcarraldo/. Accessed 29 Sep. 2009. 

"MLA Formatting and Style Guide." The Purdue OWL , 2 Aug. 2016, owl.english.purdue.edu/owl/resource/747/01/. Accessed 2 April 2018.

Multiple citations

To cite multiple sources in the same parenthetical reference, separate the citations by a semi-colon:

Time-based media sources

When creating in-text citations for media that has a runtime, such as a movie or podcast, include the range of hours, minutes and seconds you plan to reference. For example: (00:02:15-00:02:35).

When a citation is not needed

Common sense and ethics should determine your need for documenting sources. You do not need to give sources for familiar proverbs, well-known quotations, or common knowledge (For example, it is expected that U.S. citizens know that George Washington was the first President.). Remember that citing sources is a rhetorical task, and, as such, can vary based on your audience. If you’re writing for an expert audience of a scholarly journal, for example, you may need to deal with expectations of what constitutes “common knowledge” that differ from common norms.

Other Sources

The MLA Handbook describes how to cite many different kinds of authors and content creators. However, you may occasionally encounter a source or author category that the handbook does not describe, making the best way to proceed can be unclear.

In these cases, it's typically acceptable to apply the general principles of MLA citation to the new kind of source in a way that's consistent and sensible. A good way to do this is to simply use the standard MLA directions for a type of source that resembles the source you want to cite.

You may also want to investigate whether a third-party organization has provided directions for how to cite this kind of source. For example, Norquest College provides guidelines for citing Indigenous Elders and Knowledge Keepers⁠ —an author category that does not appear in the MLA Handbook . In cases like this, however, it's a good idea to ask your instructor or supervisor whether using third-party citation guidelines might present problems.

Citations - APA: General

• Advertisements
• Audio Materials
• Books, eBooks & Pamphlets
• Class Notes, Class Lectures and Presentations
• Encyclopedias & Dictionaries (Reference Works)
• Government Documents
• Images, Charts, Graphs, Maps & Tables
• Magazine Articles
• Newspaper Articles
• Pesonal Communication (Interviews, Emails, & Telephone)
• Social Media
• Videos & DVDs
• When Creating Digital Assignments
• When Information Is Missing
• Works in a Foreign Language
• Works Quoted in Another Source (Secondary Source)
• In-Text Citations - Quoting & Paraphrasing
• Formatting - Essay, Reference List, Appendix, & Sample Paper
• Annotated Bibliography

On This Page

Commonly used terms.

Reference Sources

What is a Citation? 

A "citation" is the way you tell your readers that certain material in your work came from another source. It also gives your readers the information necessary to find that source again, including: 

• Information about the author.
• Title of the work.
• Name and location of the company that published your copy of the source.
• Date your copy was published.
• Page numbers of the material you are borrowing.

Giving credit to the original author by citing sources is the only way to use other people's work without plagiarizing. But there are a number of other reasons to cite sources:

• Citations are extremely helpful to anyone who wants to find out more about your ideas and where they came from.
• Not all sources are good or right -- your own ideas may often be more accurate or interesting than those of your sources. Proper citation will keep you from taking the rap for someone else's bad ideas.
• Citing sources shows the amount of research you've done.
• Citing sources strengthens your work by lending outside support to your ideas.

When to Cite?

Whenever you borrow words or ideas, you need to acknowledge their source. The following situations almost always require citation:

• Quotations.
• Paraphrasing.
• Using an idea that someone else has already expressed.
• Making specific reference to the work of another.
• Someone else's work has been critical in developing your own ideas.

"What is a Citation?."  Plagiarism.org . iParadigms, LLC, 2015. Web. 22 Nov. 2015.  http://www.plagiarism.org/ .

APA style was created by the American Psychological Association. It is a set of rules for publications, including research papers.

In APA, you must cite sources that you have paraphrased, quoted or otherwise refer to in your research paper.

Cite your sources in two places:

• In the body of your paper with an in-text citation.
• In the References list at the end of your paper.

APA is commonly used by the follow subjects:

• Social Sciences, such as Psychology, Linguistics, Sociology, Economics, and Criminology

This research guide is based on the  Publication Manual of the American Psychological Association  (6th ed.) . The contents are accurate to the best of our knowledge.

This guide is used/adapted with the permission of Seneca College Libraries. For information please contact  [email protected] .

Note: When copying this guide, please retain this box.

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Citation Guides

7th Edition APA Citation Style Guide

9th Edition MLA Citation Style Guide  

OWL of Purdue Guide to 17th Edition Chicago Citation Style Guide

What Is Citation?

In academic writing, authors must acknowledge their sources of information. Citations are how those acknowledgements are included in your writing. Instructors determine which style of citation is used. Although each citation style differs slightly, they provide the same basic information which helps people locate your information sources.

Avoiding Plagiarism

• Avoiding Plagiarism Guide from the APA
• Avoiding Plagiarism Guide from the MLA
• Preventing Plagiarism when Writing from Plagiarism.com

How can I avoid plagiarism? To avoid plagiarism, give credit whenever you:

• Directly quote written or spoken words. Be sure to enclose these words and/or sentences in quotations marks!
• Paraphrase spoken or written words. Paraphrase means to re-write in your own words; merely reordering or substituting words is still considered plagiarism!
• Use theories, ideas, opinions, research, etc. that are not your own.
• Use historical, statistical, or scientific facts or data that are not your own.

      (Source: Adapted from  "Plagiarism: What It is and How to Recognize and Avoid It"  from Writing Tutorial Services at Indiana University)

Avoiding plagiarism in Computer Programs

• Do not present the work of others as your own
• Determine when  copying code and collaborating is acceptable
• Learn when and how to use an outside reference and document your source

(Sources: Adapted from Avoiding Plagiarism from the Oregon Institute of Technology and Plagiarism in a Programming Context from Arkansas State University)

Why do I need to cite sources? Usually all research papers must include citations. Citations ensure that:

• Anyone reading your paper can easily find your sources.
• Words and ideas used from your sources are not assumed to be your own.
• Authors and researchers are properly credited for their original work.

Quoting, Paraphrasing, and Summarizing

• Quoting, Summarizing, Paraphrasing, from OWL of Purdue Three ways of incorporating the words and ideas of other people into your own writing as explained by Purdue University Online Writing Lab.

Examples and Exercises for Understand Paraphrasing and Summarizing

Practice identifying appropriately paraphrased passages with the University of Arizona's Global Campus Writing Center Paraphrasing Activity .

Practice summarizing and paraphrasing with this introductory exercise from the Owl of Purdue, answers provided.

Write your own paraphrases and evaluate then with the OWL of Purdue paraphrasing exercise and answers .

Examples of plagiarism and Tutorials to learn more

• Summarizing, Paraphrasing, and Quoting from the OWL of Purdue
• Academic Integrity Tutorial with examples  from NIU
• Examples of Plagiarism from Bowdoin College
• Plagiarism Tutorial from IU
• Plagiarism Tutorial playllist on YouTube from Texas A&M

Consequences for Plagiarism

• Buzzfeed senior reporter Ryan Broderick fired for plagiarism 2020
• Cornell scientist resigned following retractions for research misconduct 2019
• Der Spiegel reporter Claas Relotius fired for false reporting 2019
• Discredited researcher caught lying about lionfish 2019
• German Defense Minister stripped of doctorate and resigned over plagiarism 2011
• IGN Nintendo editor Filip Miucin fired for plagiarizing a game review 2018
• Jonah Lehrer fired from The New Yorker and Wired for plagiarism 2012
• Musical plagiarism cases 1960s-2020s
• NBC reporter fired for plagiarism, 2022
• New York Times returns Peabody after falsifications come to light 2020
• Plagiarism in coding at Northeast University 2019
• Publisher Elsevier retracts heavily plagiarized book, 2021
• Snopes co-founded suspended and investigated for plagiarism, 2021
• Study with falsified data by Michael LaCour retracted 2015
• University of South Carolina president resigns after plagiarized speech, 2021

OC Resources

• The Writing Center If you're in doubt about whether you might be committing plagiarism, contact the Writing Center for an appointment.
• OC Libraries Librarians on duty on the Bremerton campus or the Live Chat widget, can assist you with your research and citation.

AITools— ChatGPT, etc.

Your instructors determine if there are appropriate uses for AI tools in your assignments. Unauthorized use may be a violation of the Student Conduct Code . When you are permitted to use ChatGPT or other generative AI tools, be sure to properly cite your sources. 

APA- Citing AI Tools (U of GH)

MLA- How to cite AI

Avoid Plagiarism in Coding

• Plagiarism and Writing Code from Carleton College By Dr. Jeff Ondich of Carleton College's department of Computer Science
• Moss- Measure of Software Similarity Checks for plagiarism in code written in: C, C++, Java, C#, Python, Visual Basic, Javascript, FORTRAN, ML, Haskell, Lisp, Scheme, Pascal, Modula2, Ada, Perl, TCL, Matlab, VHDL, Verilog, Spice, MIPS assembly, a8086 assembly, a8086 assembly, HCL2.

Collaboration, Copying, and Cheating

• Academic Integrity from MIT Handbook for Students Useful explanations in practical terms from MIT to help you avoid cheating.

Olympic College's Academic Dishonesty Policy

(1) Academic dishonesty. Any act of academic dishonesty including, but not limited to, cheating, plagiarism, and fabrication.

(a) Cheating includes any attempt to give or obtain unauthorized assistance relating to the completion of an academic assignment.

(b) Plagiarism includes taking and using as one's own, without proper attribution, the ideas, writings, or work of another person in completing an academic assignment. Prohibited conduct may also include the unauthorized submission for credit of academic work that has been submitted for credit in another course.

(c) Fabrication includes falsifying data, information, or citations in completing an academic assignment and also includes providing false or deceptive information to an instructor concerning the completion of an assignment.

Student Conduct Code /   Prohibited student conduct

Community Standards at OC

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APA 7th Edition Guide

In-text citations.

• APA Paper Basics
• Preventing Plagiarism
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• Setting Up Your Paper
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• Creating In-Text Citations

Formatting In-Text Citations

• Placing In-Text Citations in a Paper
• Quotations & Block Quotations
• Paraphrases & Summaries

Why Cite Resources?

Citing sources in the body of a research paper tells the reader that outside source material was used in the sentence where the in-text citation appears.  This lets the reader know it is not their original work or thought. Citing sources:

• Lets the reader know whose research or ideas or theories influenced the paper's author
• Provides authority and support for the positions taken in the paper
• Acknowledges others in the field by giving credit for their original work

In-text citations also serve as finding tools. Because in-text citations are composed of the first two elements of the reference for the resource (author's last name and publication date), it provides the reader with enough information to find the resource in the paper’s References list. In other words, in-text citations and references match!

What Needs to be Cited?

According to the Publication Manual of the American Psychological Association (7th ed.),

" Plagiarism is the act of presenting the words, ideas, or images of another as one's own; it denies authors credit where credit is due" (American Psychological Association, 2020, p. 21).

In other words, using information from source material must be cited in the text and in the Reference list of APA-style papers.  This includes using others:

• Words  - Quotations
• Ideas  - Summaries, Paraphrases
• Data  - Numbers, Data
• Images   - Pictures, Charts, Graphs

View examples of references and companion in-text citations in the References page s in the APA Guide.

American Psychological Association. (2020). Publication manual of the American Psychological Association (7th ed.). https://doi.org/10.1037/0000165-000

Creating In-Text Citations: Paraphrases and Summaries

(Author, Date)       

APA style uses the Author-Date citation system. In-text citations appear in the text of the paper to let readers know that information in the sentence where the in-text citation appears was taken from source material. They are composed of the first two elements of the corresponding reference (Author, Date)  for the resource and are designed to be short to avoid disrupting the flow of the paper.

There are two types of in-text citation:

• Parenthetical

Parenthetical In-Text Citation

This is the most common form of in-text citation.  It is composed of the author(s) last name and the year of publication. It is called a parenthetical citation because this information is enclosed in parentheses. The parenthetical citation appears at the end of the sentence where information from the source was used and, because it is a part of the sentence, appears before the period. See the example of a parenthetical citation below:

Students reported they prefer writing on a computer rather than with paper and pen  (Cheung, 2016) .

Narrative In-Text Citation

The narrative citation is used when the author's name is used in a sentence. In this case, the year of publication enclosed in parentheses follows the author's name in the sentence. See the example of a narrative citation below:

In his survey, Cheung  (2016)  found that undergraduate writers produced higher quality writing when composing on a computer rather than with paper and pen.

In-Text Citations and References are Connected and Match!

In-text citations have two functions. First, they alert the reader that information from source material was used in a sentence where the in-text citation appears. It lets the reader know who's work influenced the writer's position or conclusions on the topic. Second, it serves as a finding tool so that the reader can quickly find the full reference in the reference list. The reference and in-text citation need to match. The example below illustrates how these match:

In-text citations follow the Author-Date pattern. In-text citations can appear at the end of a sentence (parenthetical in-text citation) or in the text of the sentence if the author's name is incorporated (narrative in-text citation). If a work is by three or more authors, list the first author's last name followed by the phrase "et al." and the year of publication.

Examples of in-text citations for works by one author, two authors, three or more authors, and group authors appear below:

Work by One Author

    Parenthetical in-text citation              (Davis, 2019).

    Narrative in-text citation                     According to Davis (2019),...

Work by Two Authors

    Parenthetical in-text citation              (Ryan & Cooper, 2020).

    Narrative in-text citation                     In the study conducted by Ryan and Cooper (2020),...

Work by Three or More Authors

   Parenthetical in-text citation              (Morrison et al., 2018).

    Narrative in-text citation                     In the Morrison et al. (2018) study,...

Work by Group Author

    Parenthetical in-text citation

• First citation                                 (American Nurses Association [ANA], 2019).
• Subsequent citation                     (ANA, 2019).

   Narrative in-text citation

• First citation                                  The Centers for Disease Control and Prevention (CDC, 2020) report...
• Subsequent citation                     According to the CDC (2020), recommendations include...                      

Placing In-Text Citations

In-text citations follow the Author-Date pattern and appear in the sentence where information from source material is used.  Placement of in-text citations vary depending on whether the author(s) name is incorporated into the sentence (narrative citation) or if the author(s) is not named directly in the sentence (parenthetical citation). In-text citations are a part of the sentence and appear before the ending period.

Parenthetical Citations

A parenthetical citation appears when information from source material is used, but the author(s) name is not included in the sentence text. This type of in-text citation is composed of the author(s) last name comma year of publication enclosed in parentheses. It is placed at the end of the sentence before the ending period.  

Narrative Citations

A narrative citation is used when the author(s) name is included in the sentence text. In this case, the year of publication is enclosed in parentheses and appears after the author(s) name.

In his survey,  Cheung  (2016)   found that undergraduate writers produced higher quality writing when composing on a computer rather than with paper and pen.

Creating In-Text Citations: Quotations

Author-Date-#   pattern:

When you copy a portion of the text directly from a source, it is called a  direct quotation . You will enclose the quote in quotation marks, and your citation will contain the last name of the author(s), the year of publication, and page number of where the quote can be found in the source:

If you are using a source that has  pages , then you will use an abbreviated p.:

(Smith, 2018, p. 4).

If you are using a source that does not have pages (a website), then you will use a  paragraph number . You will count down to the paragraph where your quote is located. You will use an abbreviated para.: 

(Wilson & Miller, 2019, para. 2).

Parenthetical In-Text Citation:

If the author’s name is not incorporated in your sentence include the author’s last name, year of publication, and page or paragraph number separated with commas and enclosed in parentheses at the end of the quotation: 

Many writers appreciate the “ability to edit instantaneously”  (Smith, 2008, p. 72)  when writing in pencil or on a computer.

If you incorporate the author’s name into your sentence follow the author's name with the year of publication in parentheses and include the location in parentheses directly following the quote:

In his survey,  Miller (2006)  found that some writers like the sound “of graphite turning ideas into reality”  (p. 72)  when writing in pencil. 

Quotations of 40 or More Words Require Block Format

Quotations of 40 or more words included in a paper are presented in block format. The quotation begins on a new line and the whole quotation is indented 1/2 inch from the left margin. No quotation marks are used and the citation appears at the end of the quotation after the final punctuation mark. In fact, this is the only situation where a parenthetical reference appears outside of a period!

Writing Tip:    Block quotations should be used sparingly.   Remember that your voice is important -- after all it is your paper! Instead of using a block quotation, consider taking pieces of the larger quote and either paraphrase them (put their ideas into your own words and provide an in-text citation) or include precise, shorter quotations from the larger quote, integrated into your own sentences. Either approach will help to ensure that you (the writer) have engaged with information in the quote and directly applied it to the topic of the paper.

Here is an example of a block quotation. Note: Normally the passage would be double spaced but, due to space restrictions, this example is single spaced.

Place direct quotations longer than 40 words in a free-standing block of typewritten lines, and omit quotation marks.  Start the quotation on a new line, indented 1/2 inch from the left margin, i.e., in the same place you would begin a new paragraph.  Type the entire quotation on the new margin, and indent the first line of any subsequent paragraph within the quotation 1/2 inch from the new margin.  Maintain double-spacing throughout.  The parenthetical reference should come after the closing punctuation mark. (Angeli, et al., 2018, para. 27)

To create a block quotation, use the block indent button:

Although paraphrasing information is preferable, there are specific situations when a quotation can be an effective choice.  For example:

• Including a famous or familiar quotation can be effective when introducing a topic or in setting the tone of a paper.
• Providing the words of an expert can bolster your position or argument.
• In rare instances, it may be difficult to paraphrase a short passage without changing the meaning; including a precise quotation may be preferable.
• Sources of facts and statistics--including those presented in tables or charts -- must be documented in your paper using in-text citations and references.
• Including a quotation that opposes your position can be an effective method to prove why your position on the issue is preferable.

Paraphrases and Summaries

Author-Date  pattern:

When you  summarize ,  paraphrase , or otherwise refer to an idea, concept, or fact gained through your research, your citation will contain the last name of the author(s) and the year of publication:

(Smith, 2018)

(Wilson & Miller, 2019)

Qualities of a "Good" Paraphrase

Academic writing often requires students to integrate information found in source material.  There are various ways to do this; quotations, summaries, or paraphrases.  A  paraphrase  is a detailed restatement in your own words of main ideas from the portion of the source that is paraphrased.

Creating a well-written paraphrase can be a challenging skill to learn.  Understanding the qualities of a "good" paraphrase can help. A well-written paraphrase includes the following qualities:

• All of the main details in the original appear in the paraphrase
• The paraphrase does not change the original author's meaning.
• ​The paraphrase is roughly the same length or shorter than the original. 
• ​ The paraphrase is written using language, tone, and style that is your own.
• ​ Paraphrased material must include both an in-text citation and a reference in the References list.

Example of a well-written paraphrase:

Original Passage:

University of Tulsa psychologist Judy Berry studied seventy-three Oklahoma eighth graders who had taken a parenting course.  For ten days, each student had to care for a ten-pound sack of flour as if it were a baby.  Berry's research on her young subjects suggests the course worked.  The teenagers in the study had a sounder sense of parental responsibility than they did before they took the course.

Harper, K. S. (1996). 'Flour babies' surrogacy teaches eight-graders parenting skills.  Journal of Child and Family Studies, 25 (4), 25-28.

Example of a Good Paraphrase:

Extended parental role-playing can actually increase an adolescent's awareness of parental responsibilities as shown by psychologist Judy Berry's study involving eighth grade students (Harper, 1996).

Avoid Patch Writing!

Students learning how to paraphrase may inadvertently "patch write."  Patch writing occurs when a writer uses a passage from source material and changes a few words and phrases before including the passage in a paper or assignment.  Not only is this  "bad" paraphrasing but it is also a form of plagiarism.  View the example below to gain a better understanding of patch writing:

University of Tulsa psychologist Judy Berry studied seventy-three Oklahoma eighth graders who had taken a parenting course.  For ten days, each student had to care for a ten-pound sack of flour as if it were a baby.  Berry's research on her young subjects suggests the course worked.  The teenagers in the study had a sounder sense of parental responsibility than they did before they took the course.

Patchwriting Example:

University of Tulsa psychologist Judy Berry  studied  eighth graders who had taken a parenting course.  Students had to treat  a ten-pound sack of flour as if it were a baby.   The results of Berry's study suggested  that teenagers in the study had a  better understanding  of parental responsibility than they did before they took the course  (Harper, 1996).

TIP:   Notice how the bolded phrases are identical to the original.  Even though there is an in-text citation, patchwriting is still a form of plagiarism.

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Looking for a book, article, database or something else for your research, what is plagiarism.

Plagiarism is defined as "a piece of writing that has been copied from someone else and is presented as being your own work" or "taking someone's words or ideas as if they were your own"  [ 1 ]

Plagiarism is a serious issue in the academic community. While plagiarism sometimes does occur intentionally, it also occurs because the writer doesn’t understand or does not know how to avoid it. Please visit our online tutorial:  Plagiarism 101  for an entertaining and interesting look at why people plagiarize and strategies to avoid it.

Plagiarism occurs when you use someone else’s ideas and PRETEND they are your own. Avoiding plagiarism doesn’t mean that you can never use other people’s ideas. It’s a widely known secret that in fact you CAN use other peoples’ ideas and even their words. For many research papers you NEED to do this in order to prove your own points. So use their ideas! Use their words! Professors expect to see in your writing that you’ve done your research and understand what the experts think when you formed your own opinions. The trick is to acknowledge who these expert ideas really belong to by CITING them!

So let’s assume you don’t want to plagiarize, you’ve given yourself enough time to do it right, but you’re still not sure about “putting things in your own words,” judging when to cite work, or how to cite it. Read on for more information and examples.

Why acknowledge sources?

Doing research for a paper is an exploration and learning process. By acknowledging our sources we show our reader the path we took to come to our conclusions. Citing the authors we read shows how we tied others’ research and ideas together and how we came to learn about and develop our own ideas and opinions.

Why should you cite your sources?

1. Citations reflect the careful and thorough work you have put into locating and exploring your sources.

2. Citations help readers understand the context of your argument and are a courtesy to the reader, who may share your interest in a particular area of study.

3. Citations allow you to acknowledge those authors who contributed to your learning and your work.

4. Citations, by illustrating your own learning process, also draw attention to the originality and legitimacy of your own ideas.

5. By citing sources you demonstrate your integrity and skill as a responsible student and participant in your field of study.  [2]

When to cite sources

While professors and scholars may have specific requirements based on the needs of their discipline, there are cases where you should  always  cite your sources.

1. Direct quotes of more than one word.  If the author’s words are powerful or you need to be specific for your argument, the authors’ words can be used as a direct quote.

2. Paraphrasing or summarizing.  If you want to use someone else’s idea to help you make your point or to support your own ideas, in this case you would “translate” the ideas into your own words.

3. Information which may be common knowledge  but still unfamiliar to your reader. This would also include statistical information which may be familiar information but still requires confirmation.

4. Not just books or articles  should be cited. Any source that you use for information can and should be cited including interviews, websites, TV programs, etc.

5. Whenever you are not sure  if something should be cited, err on the side of caution and cite sources.

Let’s look at some examples…

Direct quotes

How much you quote will determine how it appears in the body of your paper but whether it is one word or an entire paragraph, direct quotes need to be cited.

Lappe’s explanation of a "thin democracy"  [3]  addresses a number of basic flaws within our American society.

Global warming is being recognized as a major issue throughout the world and as Al Gore instructs, "it is time to make peace with our planet."  [4]

Paraphrasing or Summarizing

This involves translating what you have read (or heard) and putting it into your own words. Paraphrasing typically refers to putting an idea or passage into your own words. Summarizing involves capturing the main idea or reducing a detailed piece to a shorter and more general synopsis.

Here's an example:

"Instructors usually allow students to find their own topics for a major writing assignment; thus choose something of interest to you so you won’t get bored after a few days. At the same time, your chosen topic will need a scholarly perspective." [5]

Paraphrase : When students are permitted to select their own topic to write about they should choose one that is interesting to them. The topic should also be scholarly in nature so that students will be able to find appropriate research and resources on the topic.  [5]

Summary : Students should select writing topics that are interesting and also lend themselves to academic research.  [5]

A summary generally addresses the overall theme of a passage, article, opinion, etc. while a paraphrase generally restates a more specific thought or idea. The difference between summarizing and paraphrasing is sometimes obvious and sometimes subtle — do you see the difference?

Common Knowledge? Or Not?

Some basic facts are common knowledge and easily confirmed from a variety of sources. Statistics should always be cited, as well as opinions and less familiar facts. Information that is considered well-known within your field of study will also help determine if it is considered common or not. However, if you are not sure, cite it!

The University at Albany located in Albany, New York and is part of the State University of New York.

This is common knowledge and easily confirmed in a multitude of sources.

The State University of New York was officially established in February of 1948 and currently consists of 64 institutions. The University at Albany is one of ten University Centers that are part of the SUNY system.  [6]

While the SUNY system is well known and these facts are easily confirmed, specific historical information or statistics should be cited.

How to cite?

We’ve talked about plagiarism as well as why and when to cite. The next question is "How?"

There are  two things you need to know  from your professor.

The FIRST is how you will reference your sources within your paper. Generally you will use one of the following options:

• IN TEXT  citation is when your source author is included within the body of your paper. This acts as a reference to your 'Works Cited' page.
• END NOTES  format is used in this document. The cited idea or quote is noted with a number and the source is listed at the end of the paper.
• FOOT NOTES  format is similar to end notes however the citations are listed at the bottom of each page.

The SECOND thing you need to know is what Format and Style Guide to use. There are very specific rules about how to do this that are not included in this document. Your professor will tell you which s/he wants you to follow. The choices will typically be one of the following:

• MLA  Format and Style Guide (Modern Language Association)
• APA  Format and Style Guide (American Psychological Association)
• CHICAGO  Manual of Style

Please visit the University Libraries' Citation Basics research guide  for information and instructions on these style guides. Once you know what your professor wants you will need to follow the rules of that format accordingly.

[ 1 ]  "Plagiarism."  WordNet 3.0 . Princeton University. 03 Apr. 2008.  Dictionary.com http://dictionary.reference.com/browse/plagiarism .

[ 2 ] Adapted from "Sources and Citation at Dartmouth College." Dartmouth College. 1998. Retrieved 9 Feb 2009.  http://www.dartmouth.edu/~writing/sources/sources-citation.html

[ 3 ] Lappe, Frances Moore.  Getting a Grip.  Cambridge, MA : Small Planet Media, 2007.

[ 4 ] Gore, Al. "Nobel Prize Acceptance Speech."  Al’s Journal . December 10, 2007. Retrieved April 10, 2008  http://blog.algore.com/2007/12/nobel_prize_acceptance_speech.html

[ 5 ] Lester, James D. & James D. Lester Jr.  Writing Research Papers: A Complete Guide, 11th Ed.  New York: Pearson Education, 2005.

[ 6 ] "Short History of SUNY." The State University of New York. 2008. Retrieved April 25, 2008.  http://www.suny.edu/student/university_suny_history.cfm

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Ten simple rules for responsible referencing

Bart penders.

Maastricht University, Care and Public Health Research Institute (CAPHRI), Department of Health, Ethics & Society, Maastricht, the Netherlands

We researchers aim to read and write publications containing high-quality prose, exceptional data, arguments, and conclusions, embedded firmly in existing literature while making abundantly clear what we are adding to it. Through the inclusion of references, we demonstrate the foundation upon which our studies rest as well as how they are different from previous work. That difference can include literature we dispute or disprove, arguments or claims we expand, and new ideas, suggestions, and hypotheses we base upon published work. This leads to the question of how to decide which study or author to cite, and in what way.

Writing manuscripts requires, among so much more, decisions on which previous studies to include and exclude, as well as decisions on how exactly that inclusion takes place. A well-referenced manuscript places the authors’ argument in the proper knowledge context and thereby can support its novelty, its value, and its visibility. Citations link one study to others, creating a web of knowledge that carries meaning and allows other researchers to identify work as relevant in general and relevant to them in particular.

On the one hand, citation practices create value by tying together relevant scientific contributions, regardless of whether they are large or small. In the process, they confer or withhold credit, contributing to the relative status of published work in the literature. On the other hand, citation practices exist in the context of current regimes of evaluating science. While it may go unnoticed in daily writing practices, the act of including a single reference in a study is thus subject to value-based criteria internal to science (e.g., content, relevance, credit) and external to science (e.g., accountability, performance).

Accordingly, referencing is not a neutral act. Citations are a form of scientific currency, actively conferring or denying value. Citing certain sources—and especially citing them often—legitimises ideas, solidifies theories, and establishes claims as facts. References also create transparency by allowing others to retrace your steps. Referencing is thus a moral issue, an issue upon which multiple values in science converge. Citing competitors adds to their profiles, citing papers from a specific journal adds to its impact factor, citing supervisors or lab mates helps build your own profile, and citing the right papers helps establish your familiarity with the field. All of these translate into pressures on scientists to cite specific sources, from peers, editors, and others. Fong and Wilhite demonstrate the abundance of so-called coercive citation practices [ 1 ]. Also, citation-based metrics have proliferated as proxies for quality and impact over the years [ 2 – 4 ], only to be currently subjected to significant and highly relevant critique [ 5 – 8 ]. To cite well, or to reference responsibly, is thus a matter of concern to all scientists.

Here, I offer 10 simple rules for responsible referencing. Scientists as authors produce references, and as readers and reviewers, they assess and evaluate references. Through this symmetrical relationship to literature that all scientists share, they take responsibility for tying together all knowledge it contains. Producing and evaluating references are, however, distinct processes, warranting different responsibilities. Respecting this dual relationship researchers have with literature, the first six rules primarily refer to producing a citation and the responsibilities this entails. The second set of four rules refers to evaluating citations and the meaning they have or acquire once they have become part of a text.

Rule 1: Include relevant citations

All scholarly writing requires a demonstration of the relevance of the questions asked, a display of the methods used, a rationale for the use of materials, and a discussion of issues relevant to the content of the publication. All of these are done, at least in large part, by including citations to relevant previous work. Omitting such references can wrongfully suggest that your own publication is the origin of an idea, a question, a method, or a critique, thereby illegitimately appropriating them. Citations identify where ideas have come from, and consulting the cited works allows readers of your text to study them more closely, as well as to evaluate whether your use of them is appropriate.

A single exception exists when facts, findings, or methods have become part of scientific or scholarly canon. There is no need to include a citation on the claim that DNA is built out of four bases, nor do you have to cite Kjell Kleppe or Kary Mullis every time you use PCR (neither do I right now). However, the decision as to when something truly becomes part of canon can be quite difficult and will include periods of adjustment (with irregular citation) and negotiation (on whether to cite or not).

Rule 2: Read the publications you cite

Citation is not an administrative task. First, a single paper can be cited for multiple reasons, ranging from reported data to methods, and can be cited both positively and negatively in the literature. The only way to identify whether its content is relevant as support for your claim is to read it in full.

Second, the collection of citations included to support your work and argument is one of the elements from which your work draws credibility. The same goes for the citations you include to criticise, dispute, or disprove. As a consequence, a chain is only as strong as its weakest link. The quality of the publication you trust and upon which you confer authority codetermines the quality and credibility of your work. Citation rates, especially on the journal level, do not correspond well to research quality [ 9 ], and they conflate positive and negative citations, not distinguishing authority conferred or authority that is challenged. To cite meaningfully and credibly requires that you consult the content of a publication rather than whether others have cited it, as a criterion for citation.

Rule 3: Cite in accordance with content

If, at some phase in the research, you have decided that a specific study merits citation, the issue of specifically how and where to cite it deserves explicit consideration. Mere inclusion does not suffice. Sources deserve credit for the exact contribution they offer, not their contribution in general. This may mean that you need to cite a single source multiple times throughout your own argument, including explanations or indications why.

A specific way to break Rule 3 is in the form of the so-called ‘Trojan citation’ [ 10 ]. The Trojan citation arises when a publication reporting similar findings to your own is cited in the context of a discussion of a minor issue, ignoring (sometimes deliberately) its key argument or contribution. By focussing on a trivial detail, the Trojan citation obscures the true significance of the cited work. As a consequence, it hides that your work is not as novel as it seems. As a questionable citation practice, a Trojan citation can be used to satisfy reviewers’ or editors’ requests to include a reference to a relevant paper. Alternatively, a Trojan citation may emerge unknowingly when (1) you are unaware of the content of a cited publication (not adhering to Rule 2 creates a very significant risk of being unable to follow Rule 3) or (2) disputes exist in the scientific community or among the authors on the contribution and/or quality of a scientific publication (in which case, Rule 4 will help).

Rule 4: Cite transparently, not neutrally

Citing, even in accordance with content, requires context. This is especially important when it happens as part of the article’s argument. Not all citations are a part of an article’s argument. Citations to data, resources, materials, and established methods require less, if any, context. As part of the argument, however, the mere inclusion of a citation, even when in the right spot, does not convey the value of the reference and, accordingly, the rationale for including it. In a recent editorial, the Nature Genetics editors argued against so-called neutral citation. This citation practice, they argue, appears neutral or procedural yet lacks required displays of context of the cited source or rationale for including [ 11 ]. Rather, citations should mention assessments of value, worth, relevance, or significance in the context of whether findings support or oppose reported data or conclusions.

This flows from the realisation that citations are political, even though that term is rarely used in this context. Researchers can use them to accurately represent, inflate, or deflate contributions, based on (1) whether they are included and (2) whether their contributions are qualified. Context or rationale can be qualified by using the right verbs. The contribution of a specific reference can be inflated or deflated through the absence of or use of the wrong qualifying term (‘the authors suggest’ versus ‘the authors establish’; ‘this excellent study shows’ versus ‘this pilot study shows’). If intentional, it is a form of deception, rewriting the content of scientific canon. If unintentional, it is the result of sloppy writing. Ask yourself why you are citing prior work and which value you are attributing to it, and whether the answers to these questions are accessible to your readers.

Rule 5: Cite yourself when required

In the context of critical discussions of citations and evaluations of citation-based metrics, self-citation has almost become a taboo. It is important to realise, though, that self-citation serves an important function by showing incremental iterative advancement of your work [ 12 ]. As a consequence, your previous work or that of the group in which you are embedded should be cited in accordance with all of the rules above. The amount of acceptable self-citation is very likely to differ between fields; smaller fields (niche fields) are likely to (legitimately) exhibit more.

This does not mean that self-citation is always unproblematic. For instance, excessive self-citation can suggest salami slicing, a publication strategy in which elements of a single study are published separately [ 13 ]. This questionable research practice, in tandem with self-citation, aims to inflate publication and citation metrics.

Rule 6: Prioritise the citations you include

Many journals have restrictions on the number of references authors are allowed to include. The exact number varies per publisher, journal, and article type and can be as low as three (for a correspondence item in Nature ). Even if no reference limit exists, other journals impose a word limit that includes references, effectively also capping the amount of references. Coping with these limits sometimes requires difficult decisions to omit citations you may feel are legitimate or even necessary. In order to deal with this issue and avoid random removal of references, all desired citations require prioritisation. A few rules of thumb, shown in Box 1 , will help decisions on reference priority.

Box 1: Reference prioritisation

‘Ten simple sub-rules for prioritising references’ can help to facilitate prioritisation. In most cases, a subset of the 10 sub-rules will suffice. First, prioritise anew for each publication. Prioritisations cannot (easily) be copied from one study to another. Second, prioritise per section (e.g., introduction, methods, discussion), not across the entire paper. Different sections require different types of support. Third, for the introduction, prioritise reviews, allowing broad context for relevance and aim. Fourth, for the discussion, prioritise empirical papers, allowing detailed accounts of relative contribution. Fifth, prioritise reviewed over un- or prereviewed papers (e.g., editorials, preprints, etc.). Sixth, deprioritise self-citations. Seventh, limit the number of citations to support a specific claim, if necessary, to a single citation. Eighth, move methodological citations to supplementary (online) information. Ninth, in cases of equal relevance, prioritise citation of female first or last authors to help repair gender imbalances in science. Tenth, request the inclusion of additional references with the editors, arguing that you have used all of the previous nine sub-rules.

Rule 7: Evaluate citations as the choices that they are

Research publications are not mere vessels of data or findings. They convey a narrative explaining why questions are worth asking, what their answers may mean, how these answers were reached, why they are to be trusted, and more. They also have a purpose in the sense that they will act as support for other studies to come. Each of the elements of their story is supported by links to other studies, and each of those links is the result of an active choice by the author(s) in the context of the goal they wish to achieve by their inclusion.

At the other end of the narrative, readers assess and evaluate the story constantly, asking whether it could have been told differently. The realisation that narratives can be told differently, supported by other citations to other prior work, does not disqualify them. Both the story and the choice of citations are political choices meant to provide the argument with as much power, credibility, and legitimacy the author(s) can muster. They are tailored to the audience the authors seek to convince: their peers. The choice to include or exclude a reference can only be evaluated in the context of that narrative and the role they play in it. Peritz has provided a classification of citation roles to assist this evaluation [ 14 ].

Rule 8: Evaluate citations in their rhetorical context

Rhetorical strategies serve to convince and persuade. Narratives are but one of the tools that can be used to persuade audiences. Metaphors, numbers, and associations all feature in our research papers as tools to convince our readers. The genre of the scientific article has had centuries to evolve to incorporate many of them, with the goal of convincing readers that the author is right. Bazerman has literally written the book on this [ 15 ] and urges us to consider academic texts and their features as part of social and intellectual endeavours. Citations are a part of the social fabric of science in the sense that through citing specific sources, authors show their allegiance to schools of thought, communities, or, in the context of scientific controversies, which paradigm they consider themselves part of. Other rhetorical uses of citations include explicit citations to notable figures and their work, which can serve as appeals to authority, while long lists of citations can serve as proxies for well-studied subjects.

Consider the following: Authors can describe a field as well-studied and include three references—X, Y, and Z—as support for their claim. Alternatively, they can argue that a field is understudied but that three exceptions exist, i.e., X, Y, and Z. Understanding the value attributed to X, Y, and Z in that particular text requires assessment of the rhetorical strategies of the author(s).

Rule 9: Evaluate citations as framed communication

Authors use words to accomplish things and, in service of those goals, position their work and that of others. They frame prior work in a very specific way, supporting the arguments made. We all do. The positioning of X, Y, and Z either as the norm or as exceptions, as shown in Rule 8, is an example of framing. It is important to recognise such framing and that X, Y, and Z acquire meaning in the text as the result of the frame. There is no frameless communication, as Goffman [ 16 ] demonstrated. All messages and texts contain and require a frame—a structure of definitions and assumptions that help organise coherence, connections, and, ultimately, meaning—or in other words, a perspective on reality.

As a result, a citation is not a neutral line drawn between publications A and B. Rather, the representation of cited article A only acquires meaning in the context of citing in article B. Article A can be framed differently when cited in work B or C. It can be framed as innovative in B or dogmatic in C. Framing usually is not lying or deceiving; it is a normative positioning of evidence in context. Hence, a citation is a careful translation of a source’s relevant elements, which acquire meaning in that context only.

An important consequence of this is that merely counting citations of article A in the literature does not inform us of the value (or many types of value or lack thereof) of article A to the scientific community. This point also appears as the first principle in the Leiden Manifesto, which argues that quantitative metrics can only support qualitative metrics (i.e., reading with an attentive eye for politics, rhetoric, context, and frame—or as adhering to Rules 7–9). The Leiden Manifesto was published by bibliometricians and scholars of research evaluation following the 2014 conference on Science and Technology Indicators in Leiden, the Netherlands. It warns against the abuse of, among other things, citation-based research metrics [ 9 ].

Rule 10: Accept that citation cultures differ across boundaries

Despite critiques of the system, science is organised in such a way that citations continue to act as a currency that is represented as being universal [ 4 ]. However, citation practices are, for the most part, local practices, whether local to laboratories or department or local to disciplines. The average number of citations per paper differs between disciplines, and the way that citations are represented in the text and the value of being cited also differ radically [ 17 ]. What counts as proper citation practice in molecular biology—for instance, the inclusion of multiple references following a statement—is considered unacceptable in research ethics or science policy, in which single references require paragraphs of contextualisation and translation (see Rule 9 ). When reading a paper from an adjacent discipline, respect its different norms and conventions for responsible referencing and proper citation. If you are cited by a scientist from another discipline, assess that act as existing in a (however slightly) different citation culture.

Acknowledgments

I thank Maurice Zeegers and his team, who work on citation analyses, for stimulating me to think about the issue of citation more clearly, deeply, and critically, resulting in the considerations above. I also thank David Shaw for critical comments, moral support, and editorial assistance. As a closing note, as the human being that I am, I too have quite possibly referenced imperfectly in my previous work.

Funding Statement

The work that lead to this publication was, in part, supported by the ZonMW programme Fostering Responsible Research Practices, grant no. 45001005. The funder had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

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13.2 Citing and Referencing Techniques

Learning objective.

• Apply American Psychological Association (APA) style formatting guidelines for citations.

This section covers the nitty-gritty details of in-text citations. You will learn how to format citations for different types of source materials, whether you are citing brief quotations, paraphrasing ideas, or quoting longer passages. You will also learn techniques you can use to introduce quoted and paraphrased material effectively. Keep this section handy as a reference to consult while writing the body of your paper.

Formatting Cited Material: The Basics

As noted in previous sections of this book, in-text citations usually provide the name of the author(s) and the year the source was published. For direct quotations, the page number must also be included. Use past-tense verbs when introducing a quote—“Smith found…” and not “Smith finds.…”

Formatting Brief Quotations

For brief quotations—fewer than forty words—use quotation marks to indicate where the quoted material begins and ends, and cite the name of the author(s), the year of publication, and the page number where the quotation appears in your source. Remember to include commas to separate elements within the parenthetical citation. Also, avoid redundancy. If you name the author(s) in your sentence, do not repeat the name(s) in your parenthetical citation. Review following the examples of different ways to cite direct quotations.

Chang (2008) emphasized that “engaging in weight-bearing exercise consistently is one of the single best things women can do to maintain good health” (p. 49).

The author’s name can be included in the body of the sentence or in the parenthetical citation. Note that when a parenthetical citation appears at the end of the sentence, it comes after the closing quotation marks and before the period. The elements within parentheses are separated by commas.

Weight Training for Women (Chang, 2008) claimed that “engaging in weight-bearing exercise consistently is one of the single best things women can do to maintain good health” (p. 49).

Weight Training for Women claimed that “engaging in weight-bearing exercise consistently is one of the single best things women can do to maintain good health” (Chang, 2008, p. 49).

Including the title of a source is optional.

In Chang’s 2008 text Weight Training for Women , she asserts, “Engaging in weight-bearing exercise is one of the single best things women can do to maintain good health” (p. 49).

The author’s name, the date, and the title may appear in the body of the text. Include the page number in the parenthetical citation. Also, notice the use of the verb asserts to introduce the direct quotation.

“Engaging in weight-bearing exercise,” Chang asserts, “is one of the single best things women can do to maintain good health” (2008, p. 49).

You may begin a sentence with the direct quotation and add the author’s name and a strong verb before continuing the quotation.

Formatting Paraphrased and Summarized Material

When you paraphrase or summarize ideas from a source, you follow the same guidelines previously provided, except that you are not required to provide the page number where the ideas are located. If you are summing up the main findings of a research article, simply providing the author’s name and publication year may suffice, but if you are paraphrasing a more specific idea, consider including the page number.

Read the following examples.

Chang (2008) pointed out that weight-bearing exercise has many potential benefits for women.

Here, the writer is summarizing a major idea that recurs throughout the source material. No page reference is needed.

Chang (2008) found that weight-bearing exercise could help women maintain or even increase bone density through middle age and beyond, reducing the likelihood that they will develop osteoporosis in later life (p. 86).

Although the writer is not directly quoting the source, this passage paraphrases a specific detail, so the writer chose to include the page number where the information is located.

Although APA style guidelines do not require writers to provide page numbers for material that is not directly quoted, your instructor may wish you to do so when possible.

Check with your instructor about his or her preferences.

Formatting Longer Quotations

When you quote a longer passage from a source—forty words or more—use a different format to set off the quoted material. Instead of using quotation marks, create a block quotation by starting the quotation on a new line and indented five spaces from the margin. Note that in this case, the parenthetical citation comes after the period that ends the sentence. Here is an example:

In recent years, many writers within the fitness industry have emphasized the ways in which women can benefit from weight-bearing exercise, such as weightlifting, karate, dancing, stair climbing, hiking, and jogging. Chang (2008) found that engaging in weight-bearing exercise regularly significantly reduces women’s risk of developing osteoporosis. Additionally, these exercises help women maintain muscle mass and overall strength, and many common forms of weight-bearing exercise, such as brisk walking or stair climbing, also provide noticeable cardiovascular benefits. (p. 93)

Review the places in your paper where you cited, quoted, and paraphrased material from a source with a single author. Edit your citations to ensure that

• each citation includes the author’s name, the date of publication, and, where appropriate, a page reference;
• parenthetical citations are correctly formatted;
• longer quotations use the block-quotation format.

If you are quoting a passage that continues into a second paragraph, indent five spaces again in the first line of the second paragraph. Here is an example:

In recent years, many writers within the fitness industry have emphasized the ways in which women can benefit from weight-bearing exercise, such as weightlifting, karate, dancing, stair climbing, hiking, and jogging. Chang (2008) found that engaging in weight-bearing exercise regularly significantly reduces women’s risk of developing osteoporosis. Additionally, these exercises help women maintain muscle mass and overall strength, and many common forms of weight-bearing exercise, such as brisk walking or stair climbing, also provide noticeable cardiovascular benefits.

It is important to note that swimming cannot be considered a weight-bearing exercise, since the water supports and cushions the swimmer. That doesn’t mean swimming isn’t great exercise, but it should be considered one part of an integrated fitness program. (p. 93)

Be wary of quoting from sources at length. Remember, your ideas should drive the paper, and quotations should be used to support and enhance your points. Make sure any lengthy quotations that you include serve a clear purpose. Generally, no more than 10–15 percent of a paper should consist of quoted material.

Introducing Cited Material Effectively

Including an introductory phrase in your text, such as “Jackson wrote” or “Copeland found,” often helps you integrate source material smoothly. This citation technique also helps convey that you are actively engaged with your source material. Unfortunately, during the process of writing your research paper, it is easy to fall into a rut and use the same few dull verbs repeatedly, such as “Jones said,” “Smith stated,” and so on.

Punch up your writing by using strong verbs that help your reader understand how the source material presents ideas. There is a world of difference between an author who “suggests” and one who “claims,” one who “questions” and one who “criticizes.” You do not need to consult your thesaurus every time you cite a source, but do think about which verbs will accurately represent the ideas and make your writing more engaging. The following chart shows some possibilities.

Review the citations in your paper once again. This time, look for places where you introduced source material using a signal phrase in your sentence.

• Highlight the verbs used in your signal phrases, and make note of any that seem to be overused throughout the paper.
• Identify at least three places where a stronger verb could be used.
• Make the edits to your draft.

Writing at Work

It is important to accurately represent a colleague’s ideas or communications in the workplace. When writing professional or academic papers, be mindful of how the words you use to describe someone’s tone or ideas carry certain connotations. Do not say a source argues a particular point unless an argument is, in fact, presented. Use lively language, but avoid language that is emotionally charged. Doing so will ensure you have represented your colleague’s words in an authentic and accurate way.

Formatting In-Text Citations for Other Source Types

These sections discuss the correct format for various types of in-text citations. Read them through quickly to get a sense of what is covered, and then refer to them again as needed.

Print Sources

This section covers books, articles, and other print sources with one or more authors.

A Work by One Author

For a print work with one author, follow the guidelines provided in Chapter 13 “APA and MLA Documentation and Formatting” , Section 13.1 “Formatting a Research Paper” . Always include the author’s name and year of publication. Include a page reference whenever you quote a source directly. (See also the guidelines presented earlier in this chapter about when to include a page reference for paraphrased material.)

Two or More Works by the Same Author

At times, your research may include multiple works by the same author. If the works were published in different years, a standard in-text citation will serve to distinguish them. If you are citing multiple works by the same author published in the same year, include a lowercase letter immediately after the year. Rank the sources in the order they appear in your references section. The source listed first includes an a after the year, the source listed second includes a b , and so on.

Rodriguez (2009a) criticized the nutrition-supplement industry for making unsubstantiated and sometimes misleading claims about the benefits of taking supplements. Additionally, he warned that consumers frequently do not realize the potential harmful effects of some popular supplements (Rodriguez, 2009b).

If you have not yet created your references section, you may not be sure which source will appear first. See Chapter 13 “APA and MLA Documentation and Formatting” , Section 13.3 “Creating a References Section” for guidelines—or assign each source a temporary code and highlight the in-text citations so you remember to double-check them later on.

Works by Authors with the Same Last Name

If you are citing works by different authors with the same last name, include each author’s initials in your citation, whether you mention them in the text or in parentheses. Do so even if the publication years are different.

J. S. Williams (2007) believes nutritional supplements can be a useful part of some diet and fitness regimens. C. D. Williams (2008), however, believes these supplements are overrated.

According to two leading researchers, the rate of childhood obesity exceeds the rate of adult obesity (K. Connelley, 2010; O. Connelley, 2010).

Studies from both A. Wright (2007) and C. A. Wright (2008) confirm the benefits of diet and exercise on weight loss.

A Work by Two Authors

When two authors are listed for a given work, include both authors’ names each time you cite the work. If you are citing their names in parentheses, use an ampersand (&) between them. (Use the word and , however, if the names appear in your sentence.)

As Garrison and Gould (2010) pointed out, “It is never too late to quit smoking. The health risks associated with this habit begin to decrease soon after a smoker quits” (p. 101).

As doctors continue to point out, “It is never too late to quit smoking. The health risks associated with this habit begin to decrease soon after a smoker quits” (Garrison & Gould, 2010, p. 101).

A Work by Three to Five Authors

If the work you are citing has three to five authors, list all the authors’ names the first time you cite the source. In subsequent citations, use the first author’s name followed by the abbreviation et al. ( Et al. is short for et alia , the Latin phrase for “and others.”)

Henderson, Davidian, and Degler (2010) surveyed 350 smokers aged 18 to 30.

One survey, conducted among 350 smokers aged 18 to 30, included a detailed questionnaire about participants’ motivations for smoking (Henderson, Davidian, & Degler, 2010).

Note that these examples follow the same ampersand conventions as sources with two authors. Again, use the ampersand only when listing authors’ names in parentheses.

As Henderson et al. (2010) found, some young people, particularly young women, use smoking as a means of appetite suppression.

Disturbingly, some young women use smoking as a means of appetite suppression (Henderson et al., 2010).

Note how the phrase et al. is punctuated. No period comes after et , but al. gets a period because it is an abbreviation for a longer Latin word. In parenthetical references, include a comma after et al. but not before. Remember this rule by mentally translating the citation to English: “Henderson and others, 2010.”

A Work by Six or More Authors

If the work you are citing has six or more authors, list only the first author’s name, followed by et al. , in your in-text citations. The other authors’ names will be listed in your references section.

Researchers have found that outreach work with young people has helped reduce tobacco use in some communities (Costello et al., 2007).

A Work Authored by an Organization

When citing a work that has no individual author(s) but is published by an organization, use the organization’s name in place of the author’s name. Lengthy organization names with well-known abbreviations can be abbreviated. In your first citation, use the full name, followed by the abbreviation in square brackets. Subsequent citations may use the abbreviation only.

It is possible for a patient to have a small stroke without even realizing it (American Heart Association [AHA], 2010).

Another cause for concern is that even if patients realize that they have had a stroke and need medical attention, they may not know which nearby facilities are best equipped to treat them (AHA, 2010).

• Review the places in your paper where you cited material from a source with multiple authors or with an organization as the author. Edit your citations to ensure that each citation follows APA guidelines for the inclusion of the authors’ names, the use of ampersands and et al. , the date of publication, and, where appropriate, a page reference.
• Mark any additional citations within your paper that you are not sure how to format based on the guidelines provided so far. You will revisit these citations after reading the next few sections.

A Work with No Listed Author

If no author is listed and the source cannot be attributed to an organization, use the title in place of the author’s name. You may use the full title in your sentence or use the first few words—enough to convey the key ideas—in a parenthetical reference. Follow standard conventions for using italics or quotations marks with titles:

• Use italics for titles of books or reports.
• Use quotation marks for titles of articles or chapters.

“Living With Diabetes: Managing Your Health” (2009) recommends regular exercise for patients with diabetes.

Regular exercise can benefit patients with diabetes (“Living with Diabetes,” 2009).

Rosenhan (1973) had mentally healthy study participants claim to be experiencing hallucinations so they would be admitted to psychiatric hospitals.

A Work Cited within Another Work

To cite a source that is referred to within another secondary source, name the first source in your sentence. Then, in parentheses, use the phrase as cited in and the name of the second source author.

Rosenhan’s study “On Being Sane in Insane Places” (as cited in Spitzer, 1975) found that psychiatrists diagnosed schizophrenia in people who claimed to be experiencing hallucinations and sought treatment—even though these patients were, in fact, imposters.

Two or More Works Cited in One Reference

At times, you may provide more than one citation in a parenthetical reference, such as when you are discussing related works or studies with similar results. List the citations in the same order they appear in your references section, and separate the citations with a semicolon.

Some researchers have found serious flaws in the way Rosenhan’s study was conducted (Dawes, 2001; Spitzer, 1975).

Both of these researchers authored works that support the point being made in this sentence, so it makes sense to include both in the same citation.

A Famous Text Published in Multiple Editions

In some cases, you may need to cite an extremely well-known work that has been repeatedly republished or translated. Many works of literature and sacred texts, as well as some classic nonfiction texts, fall into this category. For these works, the original date of publication may be unavailable. If so, include the year of publication or translation for your edition. Refer to specific parts or chapters if you need to cite a specific section. Discuss with your instructor whether he or she would like you to cite page numbers in this particular instance.

In New Introductory Lectures on Psycho-Analysis , Freud explains that the “manifest content” of a dream—what literally takes place—is separate from its “latent content,” or hidden meaning (trans. 1965, lecture XXIX).

Here, the student is citing a classic work of psychology, originally written in German and later translated to English. Since the book is a collection of Freud’s lectures, the student cites the lecture number rather than a page number.

An Introduction, Foreword, Preface, or Afterword

To cite an introduction, foreword, preface, or afterword, cite the author of the material and the year, following the same format used for other print materials.

Electronic Sources

Whenever possible, cite electronic sources as you would print sources, using the author, the date, and where appropriate, a page number. For some types of electronic sources—for instance, many online articles—this information is easily available. Other times, however, you will need to vary the format to reflect the differences in online media.

Online Sources without Page Numbers

If an online source has no page numbers but you want to refer to a specific portion of the source, try to locate other information you can use to direct your reader to the information cited. Some websites number paragraphs within published articles; if so, include the paragraph number in your citation. Precede the paragraph number with the abbreviation for the word paragraph and the number of the paragraph (e.g., para. 4).

As researchers have explained, “Incorporating fresh fruits and vegetables into one’s diet can be a challenge for residents of areas where there are few or no easily accessible supermarkets” (Smith & Jones, 2006, para. 4).

Even if a source does not have numbered paragraphs, it is likely to have headings that organize the content. In your citation, name the section where your cited information appears, followed by a paragraph number.

The American Lung Association (2010) noted, “After smoking, radon exposure is the second most common cause of lung cancer” (What Causes Lung Cancer? section, para. 2).

This student cited the appropriate section heading within the website and then counted to find the specific paragraph where the cited information was located.

If an online source has no listed author and no date, use the source title and the abbreviation n.d. in your parenthetical reference.

It has been suggested that electromagnetic radiation from cellular telephones may pose a risk for developing certain cancers (“Cell Phones and Cancer,” n.d.).

Personal Communication

For personal communications, such as interviews, letters, and e-mails, cite the name of the person involved, clarify that the material is from a personal communication, and provide the specific date the communication took place. Note that while in-text citations correspond to entries in the references section, personal communications are an exception to this rule. They are cited only in the body text of your paper.

J. H. Yardley, M.D., believes that available information on the relationship between cell phone use and cancer is inconclusive (personal communication, May 1, 2009).

At work, you may sometimes share information resources with your colleagues by photocopying an interesting article or forwarding the URL of a useful website. Your goal in these situations and in formal research citations is the same. The goal is to provide enough information to help your professional peers locate and follow up on potentially useful information. Provide as much specific information as possible to achieve that goal, and consult with your professor as to what specific style he or she may prefer.

Revisit the problem citations you identified in Note 13.55 “Exercise 3” —for instance, sources with no listed author or other oddities. Review the guidelines provided in this section and edit your citations for these kinds of sources according to APA guidelines.

Key Takeaways

• In APA papers, in-text citations include the name of the author(s) and the year of publication whenever possible.
• Page numbers are always included when citing quotations. It is optional to include page numbers when citing paraphrased material; however, this should be done when citing a specific portion of a work.
• When citing online sources, provide the same information used for print sources if it is available.
• When a source does not provide information that usually appears in a citation, in-text citations should provide readers with alternative information that would help them locate the source material. This may include the title of the source, section headings and paragraph numbers for websites, and so forth.
• When writing a paper, discuss with your professor what particular standards he or she would like you to follow.

Writing for Success Copyright © 2015 by University of Minnesota is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License , except where otherwise noted.

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• Knowledge Base
• Citing sources

How to Cite Sources | Citation Generator & Quick Guide

Citing your sources is essential in  academic writing . Whenever you quote or paraphrase a source (such as a book, article, or webpage), you have to include a  citation crediting the original author.

Failing to properly cite your sources counts as plagiarism , since you’re presenting someone else’s ideas as if they were your own.

The most commonly used citation styles are APA and MLA. The free Scribbr Citation Generator is the quickest way to cite sources in these styles. Simply enter the URL, DOI, or title, and we’ll generate an accurate, correctly formatted citation.

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Table of contents

When do you need to cite sources, which citation style should you use, in-text citations, reference lists and bibliographies.

Scribbr Citation Generator

Other useful citation tools

Citation examples and full guides, frequently asked questions about citing sources.

Citations are required in all types of academic texts. They are needed for several reasons:

• To avoid plagiarism by indicating when you’re taking information from another source
• To give proper credit to the author of that source
• To allow the reader to consult your sources for themselves

A citation is needed whenever you integrate a source into your writing. This usually means quoting or paraphrasing:

• To quote a source , copy a short piece of text word for word and put it inside quotation marks .
• To paraphrase a source , put the text into your own words. It’s important that the paraphrase is not too close to the original wording. You can use the paraphrasing tool if you don’t want to do this manually.

Citations are needed whether you quote or paraphrase, and whatever type of source you use. As well as citing scholarly sources like books and journal articles, don’t forget to include citations for any other sources you use for ideas, examples, or evidence. That includes websites, YouTube videos , and lectures .

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Usually, your institution (or the journal you’re submitting to) will require you to follow a specific citation style, so check your guidelines or ask your instructor.

In some cases, you may have to choose a citation style for yourself. Make sure to pick one style and use it consistently:

• APA Style is widely used in the social sciences and beyond.
• MLA style is common in the humanities.
• Chicago notes and bibliography , common in the humanities
• Chicago author-date , used in the (social) sciences
• There are many other citation styles for different disciplines.

If in doubt, check with your instructor or read other papers from your field of study to see what style they follow.

In most styles, your citations consist of:

• Brief in-text citations at the relevant points in the text
• A reference list or bibliography containing full information on all the sources you’ve cited

In-text citations most commonly take the form of parenthetical citations featuring the last name of the source’s author and its year of publication (aka author-date citations).

An alternative to this type of in-text citation is the system used in numerical citation styles , where a number is inserted into the text, corresponding to an entry in a numbered reference list.

There are also note citation styles , where you place your citations in either footnotes or endnotes . Since they’re not embedded in the text itself, these citations can provide more detail and sometimes aren’t accompanied by a full reference list or bibliography.

A reference list (aka “Bibliography” or “Works Cited,” depending on the style) is where you provide full information on each of the sources you’ve cited in the text. It appears at the end of your paper, usually with a hanging indent applied to each entry.

The information included in reference entries is broadly similar, whatever citation style you’re using. For each source, you’ll typically include the:

• Author name
• Publication date
• Container (e.g., the book an essay was published in, the journal an article appeared in)
• Location (e.g., a URL or DOI , or sometimes a physical location)

The exact information included varies depending on the source type and the citation style. The order in which the information appears, and how you format it (e.g., capitalization, use of italics) also varies.

Most commonly, the entries in your reference list are alphabetized by author name. This allows the reader to easily find the relevant entry based on the author name in your in-text citation.

In numerical citation styles, the entries in your reference list are numbered, usually based on the order in which you cite them. The reader finds the right entry based on the number that appears in the text.

Because each style has many small differences regarding things like italicization, capitalization , and punctuation , it can be difficult to get every detail right. Using a citation generator can save you a lot of time and effort.

Scribbr offers citation generators for both APA and MLA style. Both are quick, easy to use, and 100% free, with no ads and no registration required.

Just input a URL or DOI or add the source details manually, and the generator will automatically produce an in-text citation and reference entry in the correct format. You can save your reference list as you go and download it when you’re done, and even add annotations for an annotated bibliography .

Once you’ve prepared your citations, you might still be unsure if they’re correct and if you’ve used them appropriately in your text. This is where Scribbr’s other citation tools and services may come in handy:

Plagiarism Checker

Citation Checker

Citation Editing

Plagiarism means passing off someone else’s words or ideas as your own. It’s a serious offense in academia. Universities use plagiarism checking software to scan your paper and identify any similarities to other texts.

When you’re dealing with a lot of sources, it’s easy to make mistakes that could constitute accidental plagiarism. For example, you might forget to add a citation after a quote, or paraphrase a source in a way that’s too close to the original text.

Using a plagiarism checker yourself before you submit your work can help you spot these mistakes before they get you in trouble. Based on the results, you can add any missing citations and rephrase your text where necessary.

Try out the Scribbr Plagiarism Checker for free, or check out our detailed comparison of the best plagiarism checkers available online.

Scribbr Plagiarism Checker

Scribbr’s Citation Checker is a unique AI-powered tool that automatically detects stylistic errors and inconsistencies in your in-text citations. It also suggests a correction for every mistake.

Currently available for APA Style, this is the fastest and easiest way to make sure you’ve formatted your citations correctly. You can try out the tool for free below.

If you need extra help with your reference list, we also offer a more in-depth Citation Editing Service.

Our experts cross-check your in-text citations and reference entries, make sure you’ve included the correct information for each source, and improve the formatting of your reference page.

If you want to handle your citations yourself, Scribbr’s free Knowledge Base provides clear, accurate guidance on every aspect of citation. You can see citation examples for a variety of common source types below:

And you can check out our comprehensive guides to the most popular citation styles:

At college level, you must properly cite your sources in all essays , research papers , and other academic texts (except exams and in-class exercises).

Add a citation whenever you quote , paraphrase , or summarize information or ideas from a source. You should also give full source details in a bibliography or reference list at the end of your text.

The exact format of your citations depends on which citation style you are instructed to use. The most common styles are APA , MLA , and Chicago .

The abbreviation “ et al. ” (Latin for “and others”) is used to shorten citations of sources with multiple authors.

“Et al.” is used in APA in-text citations of sources with 3+ authors, e.g. (Smith et al., 2019). It is not used in APA reference entries .

Use “et al.” for 3+ authors in MLA in-text citations and Works Cited entries.

Use “et al.” for 4+ authors in a Chicago in-text citation , and for 10+ authors in a Chicago bibliography entry.

The Scribbr Citation Generator is developed using the open-source Citation Style Language (CSL) project and Frank Bennett’s citeproc-js . It’s the same technology used by dozens of other popular citation tools, including Mendeley and Zotero.

You can find all the citation styles and locales used in the Scribbr Citation Generator in our publicly accessible repository on Github .

APA format is widely used by professionals, researchers, and students in the social and behavioral sciences, including fields like education, psychology, and business.

Be sure to check the guidelines of your university or the journal you want to be published in to double-check which style you should be using.

MLA Style  is the second most used citation style (after APA ). It is mainly used by students and researchers in humanities fields such as literature, languages, and philosophy.

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• How to Cite an Interview | APA, MLA & Chicago Style
• Parenthetical Citation | APA, MLA & Chicago Examples
• What Are Endnotes? | Guide with Examples
• What Are Footnotes? | Guide with Word Instructions
• What Does Ibid. Mean? | Definition & Examples
• What is a DOI? | Finding and Using Digital Object Identifiers
• What Is an Annotated Bibliography? | Examples & Format

What is your plagiarism score?

Citing sources: Overview

• Citation style guides

Manage your references

Use these tools to help you organize and cite your references:

• Citation Management and Writing Tools

If you have questions after consulting this guide about how to cite, please contact your advisor/professor or the writing and communication center .

Why citing is important

It's important to cite sources you used in your research for several reasons:

• To show your reader you've done proper research by listing sources you used to get your information
• To be a responsible scholar by giving credit to other researchers and acknowledging their ideas
• To avoid plagiarism by quoting words and ideas used by other authors
• To allow your reader to track down the sources you used by citing them accurately in your paper by way of footnotes, a bibliography or reference list

About citations

Citing a source means that you show, within the body of your text, that you took words, ideas, figures, images, etc. from another place.

Citations are a short way to uniquely identify a published work (e.g. book, article, chapter, web site).  They are found in bibliographies and reference lists and are also collected in article and book databases.

Citations consist of standard elements, and contain all the information necessary to identify and track down publications, including:

• author name(s)
• titles of books, articles, and journals
• date of publication
• page numbers
• volume and issue numbers (for articles)

Citations may look different, depending on what is being cited and which style was used to create them. Choose an appropriate style guide for your needs.  Here is an example of an article citation using four different citation styles.  Notice the common elements as mentioned above:

Author - R. Langer

Article Title - New Methods of Drug Delivery

Source Title - Science

Volume and issue - Vol 249, issue 4976

Publication Date - 1990

Page numbers - 1527-1533

American Chemical Society (ACS) style:

Langer, R. New Methods of Drug Delivery. Science 1990 , 249 , 1527-1533.

IEEE Style:

R. Langer, " New Methods of Drug Delivery," Science , vol. 249 , pp. 1527-1533 , SEP 28, 1990 .

American Psychological Association   (APA) style:

Langer, R. (1990) . New methods of drug delivery. Science , 249 (4976), 1527-1533.

Modern Language Association (MLA) style:

Langer, R. " New Methods of Drug Delivery." Science 249.4976 (1990) : 1527-33.

What to cite

You must cite:

• Facts, figures, ideas, or other information that is not common knowledge

Publications that must be cited include:  books, book chapters, articles, web pages, theses, etc.

Another person's exact words should be quoted and cited to show proper credit 

When in doubt, be safe and cite your source!

Avoiding plagiarism

Plagiarism occurs when you borrow another's words (or ideas) and do not acknowledge that you have done so. In this culture, we consider our words and ideas intellectual property; like a car or any other possession, we believe our words belong to us and cannot be used without our permission.

Plagiarism is a very serious offense. If it is found that you have plagiarized -- deliberately or inadvertently -- you may face serious consequences. In some instances, plagiarism has meant that students have had to leave the institutions where they were studying.

The best way to avoid plagiarism is to cite your sources - both within the body of your paper and in a bibliography of sources you used at the end of your paper.

Some useful links about plagiarism:

• MIT Academic Integrity Overview on citing sources and avoiding plagiarism at MIT.
• Avoiding Plagiarism From the MIT Writing and Communication Center.
• Plagiarism: What It is and How to Recognize and Avoid It From Indiana University's Writing Tutorial Services.
• Plagiarism- Overview A resource from Purdue University.
• Next: Citation style guides >>
• Last Updated: Jan 16, 2024 7:02 AM
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Home » How to Cite Research Paper – All Formats and Examples

How to Cite Research Paper – All Formats and Examples

Table of Contents

Research Paper Citation

Research paper citation refers to the act of acknowledging and referencing a previously published work in a scholarly or academic paper . When citing sources, researchers provide information that allows readers to locate the original source, validate the claims or arguments made in the paper, and give credit to the original author(s) for their work.

The citation may include the author’s name, title of the publication, year of publication, publisher, and other relevant details that allow readers to trace the source of the information. Proper citation is a crucial component of academic writing, as it helps to ensure accuracy, credibility, and transparency in research.

How to Cite Research Paper

There are several formats that are used to cite a research paper. Follow the guide for the Citation of a Research Paper:

Last Name, First Name. Title of Book. Publisher, Year of Publication.

Example : Smith, John. The History of the World. Penguin Press, 2010.

Journal Article

Last Name, First Name. “Title of Article.” Title of Journal, vol. Volume Number, no. Issue Number, Year of Publication, pp. Page Numbers.

Example : Johnson, Emma. “The Effects of Climate Change on Agriculture.” Environmental Science Journal, vol. 10, no. 2, 2019, pp. 45-59.

Research Paper

Last Name, First Name. “Title of Paper.” Conference Name, Location, Date of Conference.

Example : Garcia, Maria. “The Importance of Early Childhood Education.” International Conference on Education, Paris, 5-7 June 2018.

Author’s Last Name, First Name. “Title of Webpage.” Website Title, Publisher, Date of Publication, URL.

Example : Smith, John. “The Benefits of Exercise.” Healthline, Healthline Media, 1 March 2022, https://www.healthline.com/health/benefits-of-exercise.

News Article

Last Name, First Name. “Title of Article.” Name of Newspaper, Date of Publication, URL.

Example : Robinson, Sarah. “Biden Announces New Climate Change Policies.” The New York Times, 22 Jan. 2021, https://www.nytimes.com/2021/01/22/climate/biden-climate-change-policies.html.

Author, A. A. (Year of publication). Title of book. Publisher.

Example: Smith, J. (2010). The History of the World. Penguin Press.

Author, A. A., Author, B. B., & Author, C. C. (Year of publication). Title of article. Title of Journal, volume number(issue number), page range.

Example: Johnson, E., Smith, K., & Lee, M. (2019). The Effects of Climate Change on Agriculture. Environmental Science Journal, 10(2), 45-59.

Author, A. A. (Year of publication). Title of paper. In Editor First Initial. Last Name (Ed.), Title of Conference Proceedings (page numbers). Publisher.

Example: Garcia, M. (2018). The Importance of Early Childhood Education. In J. Smith (Ed.), Proceedings from the International Conference on Education (pp. 60-75). Springer.

Author, A. A. (Year, Month Day of publication). Title of webpage. Website name. URL

Example: Smith, J. (2022, March 1). The Benefits of Exercise. Healthline. https://www.healthline.com/health/benefits-of-exercise

Author, A. A. (Year, Month Day of publication). Title of article. Newspaper name. URL.

Example: Robinson, S. (2021, January 22). Biden Announces New Climate Change Policies. The New York Times. https://www.nytimes.com/2021/01/22/climate/biden-climate-change-policies.html

Chicago/Turabian style

Please note that there are two main variations of the Chicago style: the author-date system and the notes and bibliography system. I will provide examples for both systems below.

Author-Date system:

• In-text citation: (Author Last Name Year, Page Number)
• Reference list: Author Last Name, First Name. Year. Title of Book. Place of publication: Publisher.
• In-text citation: (Smith 2005, 28)
• Reference list: Smith, John. 2005. The History of America. New York: Penguin Press.

Notes and Bibliography system:

• Footnote/Endnote citation: Author First Name Last Name, Title of Book (Place of publication: Publisher, Year), Page Number.
• Bibliography citation: Author Last Name, First Name. Title of Book. Place of publication: Publisher, Year.
• Footnote/Endnote citation: John Smith, The History of America (New York: Penguin Press, 2005), 28.
• Bibliography citation: Smith, John. The History of America. New York: Penguin Press, 2005.

JOURNAL ARTICLES:

• Reference list: Author Last Name, First Name. Year. “Article Title.” Journal Title Volume Number (Issue Number): Page Range.
• In-text citation: (Johnson 2010, 45)
• Reference list: Johnson, Mary. 2010. “The Impact of Social Media on Society.” Journal of Communication 60(2): 39-56.
• Footnote/Endnote citation: Author First Name Last Name, “Article Title,” Journal Title Volume Number, Issue Number (Year): Page Range.
• Bibliography citation: Author Last Name, First Name. “Article Title.” Journal Title Volume Number, Issue Number (Year): Page Range.
• Footnote/Endnote citation: Mary Johnson, “The Impact of Social Media on Society,” Journal of Communication 60, no. 2 (2010): 39-56.
• Bibliography citation: Johnson, Mary. “The Impact of Social Media on Society.” Journal of Communication 60, no. 2 (2010): 39-56.

RESEARCH PAPERS:

• Reference list: Author Last Name, First Name. Year. “Title of Paper.” Conference Proceedings Title, Location, Date. Publisher, Page Range.
• In-text citation: (Jones 2015, 12)
• Reference list: Jones, David. 2015. “The Effects of Climate Change on Agriculture.” Proceedings of the International Conference on Climate Change, Paris, France, June 1-3, 2015. Springer, 10-20.
• Footnote/Endnote citation: Author First Name Last Name, “Title of Paper,” Conference Proceedings Title, Location, Date (Place of publication: Publisher, Year), Page Range.
• Bibliography citation: Author Last Name, First Name. “Title of Paper.” Conference Proceedings Title, Location, Date. Place of publication: Publisher, Year.
• Footnote/Endnote citation: David Jones, “The Effects of Climate Change on Agriculture,” Proceedings of the International Conference on Climate Change, Paris, France, June 1-3, 2015 (New York: Springer, 10-20).
• Bibliography citation: Jones, David. “The Effects of Climate Change on Agriculture.” Proceedings of the International Conference on Climate Change, Paris, France, June 1-3, 2015. New York: Springer, 10-20.
• In-text citation: (Author Last Name Year)
• Reference list: Author Last Name, First Name. Year. “Title of Webpage.” Website Name. URL.
• In-text citation: (Smith 2018)
• Reference list: Smith, John. 2018. “The Importance of Recycling.” Environmental News Network. https://www.enn.com/articles/54374-the-importance-of-recycling.
• Footnote/Endnote citation: Author First Name Last Name, “Title of Webpage,” Website Name, URL (accessed Date).
• Bibliography citation: Author Last Name, First Name. “Title of Webpage.” Website Name. URL (accessed Date).
• Footnote/Endnote citation: John Smith, “The Importance of Recycling,” Environmental News Network, https://www.enn.com/articles/54374-the-importance-of-recycling (accessed April 8, 2023).
• Bibliography citation: Smith, John. “The Importance of Recycling.” Environmental News Network. https://www.enn.com/articles/54374-the-importance-of-recycling (accessed April 8, 2023).

NEWS ARTICLES:

• Reference list: Author Last Name, First Name. Year. “Title of Article.” Name of Newspaper, Month Day.
• In-text citation: (Johnson 2022)
• Reference list: Johnson, Mary. 2022. “New Study Finds Link Between Coffee and Longevity.” The New York Times, January 15.
• Footnote/Endnote citation: Author First Name Last Name, “Title of Article,” Name of Newspaper (City), Month Day, Year.
• Bibliography citation: Author Last Name, First Name. “Title of Article.” Name of Newspaper (City), Month Day, Year.
• Footnote/Endnote citation: Mary Johnson, “New Study Finds Link Between Coffee and Longevity,” The New York Times (New York), January 15, 2022.
• Bibliography citation: Johnson, Mary. “New Study Finds Link Between Coffee and Longevity.” The New York Times (New York), January 15, 2022.

Harvard referencing style

Format: Author’s Last name, First initial. (Year of publication). Title of book. Publisher.

Example: Smith, J. (2008). The Art of War. Random House.

Journal article:

Format: Author’s Last name, First initial. (Year of publication). Title of article. Title of journal, volume number(issue number), page range.

Example: Brown, M. (2012). The impact of social media on business communication. Harvard Business Review, 90(12), 85-92.

Research paper:

Format: Author’s Last name, First initial. (Year of publication). Title of paper. In Editor’s First initial. Last name (Ed.), Title of book (page range). Publisher.

Example: Johnson, R. (2015). The effects of climate change on agriculture. In S. Lee (Ed.), Climate Change and Sustainable Development (pp. 45-62). Springer.

Format: Author’s Last name, First initial. (Year, Month Day of publication). Title of page. Website name. URL.

Example: Smith, J. (2017, May 23). The history of the internet. Encyclopedia Britannica. https://www.britannica.com/topic/history-of-the-internet

News article:

Format: Author’s Last name, First initial. (Year, Month Day of publication). Title of article. Title of newspaper, page number (if applicable).

Example: Thompson, E. (2022, January 5). New study finds coffee may lower risk of dementia. The New York Times, A1.

IEEE Format

Author(s). (Year of Publication). Title of Book. Publisher.

Smith, J. K. (2015). The Power of Habit: Why We Do What We Do in Life and Business. Random House.

Journal Article:

Author(s). (Year of Publication). Title of Article. Title of Journal, Volume Number (Issue Number), page numbers.

Johnson, T. J., & Kaye, B. K. (2016). Interactivity and the Future of Journalism. Journalism Studies, 17(2), 228-246.

Author(s). (Year of Publication). Title of Paper. Paper presented at Conference Name, Location.

Jones, L. K., & Brown, M. A. (2018). The Role of Social Media in Political Campaigns. Paper presented at the 2018 International Conference on Social Media and Society, Copenhagen, Denmark.

• Website: Author(s) or Organization Name. (Year of Publication or Last Update). Title of Webpage. Website Name. URL.

Example: National Aeronautics and Space Administration. (2019, August 29). NASA’s Mission to Mars. NASA. https://www.nasa.gov/topics/journeytomars/index.html

• News Article: Author(s). (Year of Publication). Title of Article. Name of News Source. URL.

Example: Johnson, M. (2022, February 16). Climate Change: Is it Too Late to Save the Planet? CNN. https://www.cnn.com/2022/02/16/world/climate-change-planet-scn/index.html

Vancouver Style

In-text citation: Use superscript numbers to cite sources in the text, e.g., “The study conducted by Smith and Johnson^1 found that…”.

Reference list citation: Format: Author(s). Title of book. Edition if any. Place of publication: Publisher; Year of publication.

Example: Smith J, Johnson L. Introduction to Molecular Biology. 2nd ed. New York: Wiley-Blackwell; 2015.

In-text citation: Use superscript numbers to cite sources in the text, e.g., “Several studies have reported that^1,2,3…”.

Reference list citation: Format: Author(s). Title of article. Abbreviated name of journal. Year of publication; Volume number (Issue number): Page range.

Example: Jones S, Patel K, Smith J. The effects of exercise on cardiovascular health. J Cardiol. 2018; 25(2): 78-84.

In-text citation: Use superscript numbers to cite sources in the text, e.g., “Previous research has shown that^1,2,3…”.

Reference list citation: Format: Author(s). Title of paper. In: Editor(s). Title of the conference proceedings. Place of publication: Publisher; Year of publication. Page range.

Example: Johnson L, Smith J. The role of stem cells in tissue regeneration. In: Patel S, ed. Proceedings of the 5th International Conference on Regenerative Medicine. London: Academic Press; 2016. p. 68-73.

In-text citation: Use superscript numbers to cite sources in the text, e.g., “According to the World Health Organization^1…”.

Reference list citation: Format: Author(s). Title of webpage. Name of website. URL [Accessed Date].

Example: World Health Organization. Coronavirus disease (COVID-19) advice for the public. World Health Organization. https://www.who.int/emergencies/disease/novel-coronavirus-2019/advice-for-public [Accessed 3 March 2023].

In-text citation: Use superscript numbers to cite sources in the text, e.g., “According to the New York Times^1…”.

Reference list citation: Format: Author(s). Title of article. Name of newspaper. Year Month Day; Section (if any): Page number.

Example: Jones S. Study shows that sleep is essential for good health. The New York Times. 2022 Jan 12; Health: A8.

Author(s). Title of Book. Edition Number (if it is not the first edition). Publisher: Place of publication, Year of publication.

Example: Smith, J. Chemistry of Natural Products. 3rd ed.; CRC Press: Boca Raton, FL, 2015.

Journal articles:

Author(s). Article Title. Journal Name Year, Volume, Inclusive Pagination.

Example: Garcia, A. M.; Jones, B. A.; Smith, J. R. Selective Synthesis of Alkenes from Alkynes via Catalytic Hydrogenation. J. Am. Chem. Soc. 2019, 141, 10754-10759.

Research papers:

Author(s). Title of Paper. Journal Name Year, Volume, Inclusive Pagination.

Example: Brown, H. D.; Jackson, C. D.; Patel, S. D. A New Approach to Photovoltaic Solar Cells. J. Mater. Chem. 2018, 26, 134-142.

Author(s) (if available). Title of Webpage. Name of Website. URL (accessed Month Day, Year).

Example: National Institutes of Health. Heart Disease and Stroke. National Heart, Lung, and Blood Institute. https://www.nhlbi.nih.gov/health-topics/heart-disease-and-stroke (accessed April 7, 2023).

News articles:

Author(s). Title of Article. Name of News Publication. Date of Publication. URL (accessed Month Day, Year).

Example: Friedman, T. L. The World is Flat. New York Times. April 7, 2023. https://www.nytimes.com/2023/04/07/opinion/world-flat-globalization.html (accessed April 7, 2023).

In AMA Style Format, the citation for a book should include the following information, in this order:

• Title of book (in italics)
• Edition (if applicable)
• Place of publication
• Year of publication

Lodish H, Berk A, Zipursky SL, et al. Molecular Cell Biology. 4th ed. New York, NY: W. H. Freeman; 2000.

In AMA Style Format, the citation for a journal article should include the following information, in this order:

• Title of article
• Abbreviated title of journal (in italics)
• Year of publication; volume number(issue number):page numbers.

Chen H, Huang Y, Li Y, et al. Effects of mindfulness-based stress reduction on depression in adolescents and young adults: a systematic review and meta-analysis. JAMA Netw Open. 2020;3(6):e207081. doi:10.1001/jamanetworkopen.2020.7081

In AMA Style Format, the citation for a research paper should include the following information, in this order:

• Title of paper
• Name of journal or conference proceeding (in italics)
• Volume number(issue number):page numbers.

Bredenoord AL, Kroes HY, Cuppen E, Parker M, van Delden JJ. Disclosure of individual genetic data to research participants: the debate reconsidered. Trends Genet. 2011;27(2):41-47. doi:10.1016/j.tig.2010.11.004

In AMA Style Format, the citation for a website should include the following information, in this order:

• Title of web page or article
• Name of website (in italics)
• Date of publication or last update (if available)
• URL (website address)
• Date of access (month day, year)

Centers for Disease Control and Prevention. How to protect yourself and others. CDC. Published February 11, 2022. Accessed February 14, 2022. https://www.cdc.gov/coronavirus/2019-ncov/prevent-getting-sick/prevention.html

In AMA Style Format, the citation for a news article should include the following information, in this order:

• Name of newspaper or news website (in italics)
• Date of publication

Gorman J. Scientists use stem cells from frogs to build first living robots. The New York Times. January 13, 2020. Accessed January 14, 2020. https://www.nytimes.com/2020/01/13/science/living-robots-xenobots.html

Bluebook Format

One author: Daniel J. Solove, The Future of Reputation: Gossip, Rumor, and Privacy on the Internet (Yale University Press 2007).

Two or more authors: Martha Nussbaum and Saul Levmore, eds., The Offensive Internet: Speech, Privacy, and Reputation (Harvard University Press 2010).

Journal article

One author: Daniel J. Solove, “A Taxonomy of Privacy,” University of Pennsylvania Law Review 154, no. 3 (January 2006): 477-560.

Two or more authors: Ethan Katsh and Andrea Schneider, “The Emergence of Online Dispute Resolution,” Journal of Dispute Resolution 2003, no. 1 (2003): 7-19.

One author: Daniel J. Solove, “A Taxonomy of Privacy,” GWU Law School Public Law Research Paper No. 113, 2005.

Two or more authors: Ethan Katsh and Andrea Schneider, “The Emergence of Online Dispute Resolution,” Cyberlaw Research Paper Series Paper No. 00-5, 2000.

WebsiteElectronic Frontier Foundation, “Surveillance Self-Defense,” accessed April 8, 2023, https://ssd.eff.org/.

News article

One author: Mark Sherman, “Court Deals Major Blow to Net Neutrality Rules,” ABC News, January 14, 2014, https://abcnews.go.com/Politics/wireStory/court-deals-major-blow-net-neutrality-rules-21586820.

Two or more authors: Siobhan Hughes and Brent Kendall, “AT&T Wins Approval to Buy Time Warner,” Wall Street Journal, June 12, 2018, https://www.wsj.com/articles/at-t-wins-approval-to-buy-time-warner-1528847249.

In-Text Citation: (Author’s last name Year of Publication: Page Number)

Example: (Smith 2010: 35)

Reference List Citation: Author’s last name First Initial. Title of Book. Edition. Place of publication: Publisher; Year of publication.

Example: Smith J. Biology: A Textbook. 2nd ed. New York: Oxford University Press; 2010.

Example: (Johnson 2014: 27)

Reference List Citation: Author’s last name First Initial. Title of Article. Abbreviated Title of Journal. Year of publication;Volume(Issue):Page Numbers.

Example: Johnson S. The role of dopamine in addiction. J Neurosci. 2014;34(8): 2262-2272.

Example: (Brown 2018: 10)

Reference List Citation: Author’s last name First Initial. Title of Paper. Paper presented at: Name of Conference; Date of Conference; Place of Conference.

Example: Brown R. The impact of social media on mental health. Paper presented at: Annual Meeting of the American Psychological Association; August 2018; San Francisco, CA.

Example: (World Health Organization 2020: para. 2)

Reference List Citation: Author’s last name First Initial. Title of Webpage. Name of Website. URL. Published date. Accessed date.

Example: World Health Organization. Coronavirus disease (COVID-19) pandemic. WHO website. https://www.who.int/emergencies/disease-coronavirus-2019. Updated August 17, 2020. Accessed September 5, 2021.

Example: (Smith 2019: para. 5)

Reference List Citation: Author’s last name First Initial. Title of Article. Title of Newspaper or Magazine. Year of publication; Month Day:Page Numbers.

Example: Smith K. New study finds link between exercise and mental health. The New York Times. 2019;May 20: A6.

Purpose of Research Paper Citation

The purpose of citing sources in a research paper is to give credit to the original authors and acknowledge their contribution to your work. By citing sources, you are also demonstrating the validity and reliability of your research by showing that you have consulted credible and authoritative sources. Citations help readers to locate the original sources that you have referenced and to verify the accuracy and credibility of your research. Additionally, citing sources is important for avoiding plagiarism, which is the act of presenting someone else’s work as your own. Proper citation also shows that you have conducted a thorough literature review and have used the existing research to inform your own work. Overall, citing sources is an essential aspect of academic writing and is necessary for building credibility, demonstrating research skills, and avoiding plagiarism.

Advantages of Research Paper Citation

There are several advantages of research paper citation, including:

• Giving credit: By citing the works of other researchers in your field, you are acknowledging their contribution and giving credit where it is due.
• Strengthening your argument: Citing relevant and reliable sources in your research paper can strengthen your argument and increase its credibility. It shows that you have done your due diligence and considered various perspectives before drawing your conclusions.
• Demonstrating familiarity with the literature : By citing various sources, you are demonstrating your familiarity with the existing literature in your field. This is important as it shows that you are well-informed about the topic and have done a thorough review of the available research.
• Providing a roadmap for further research: By citing relevant sources, you are providing a roadmap for further research on the topic. This can be helpful for future researchers who are interested in exploring the same or related issues.
• Building your own reputation: By citing the works of established researchers in your field, you can build your own reputation as a knowledgeable and informed scholar. This can be particularly helpful if you are early in your career and looking to establish yourself as an expert in your field.

About the author

Muhammad Hassan

Researcher, Academic Writer, Web developer

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Using Information Sources Ethically and Legally

• Understanding Plagiarism
• Avoidance Tips

When do I need to cite sources?

Does everything need to be cited, all you need to know about citing sources, get help from libraries and writing centers.

Always give credit where credit is due. If the words that you are including in your research belong to someone else, give credit. 

Here is  a brief list of what needs to be credited or documented :  

• Words or ideas presented in a magazine, book, newspaper, song, TV program, movie, website, computer program, letter, advertisement, or any other medium  
• Information you gain through interviewing or conversing with another person, face to face, over the phone, or in writing  
• When you copy the exact words or a unique phrase  
• When you reprint any diagrams, illustrations, charts, pictures, or other visual materials  
• When you reuse or repost any digital media, including images, audio, video, or other media  

There are certain things that  do not need documentation or credit, including :  

• Writing your own lived experiences, your own observations and insights, your own thoughts, and your own conclusions about a subject  
• When you are writing up your own results obtained through lab or field experiments  
• When you use your own artwork, digital photographs, video, audio, etc.  
• When you are using "common knowledge," things like folklore, common sense observations, myths, urban legends, and historical events (but  not  historical documents)  
• When you are using generally accepted facts (e.g., pollution is bad for the environment) including facts that are accepted within particular discourse communities (e.g., in the field of composition studies, "writing is a process" is a generally accepted fact).  

(From Plagiarism FAQs - Purdue Writing Lab )

The following chart from the UT Arlington Library Acknowledging Sources tutorial will guide you in your decision:

What is common knowledge? This refers to facts well known by many people and verifiable in five or more sources. Examples:

• Bill Gates is the founder of the Microsoft Corporation.
• There are 60 minutes in an hour.
• Columbus is the capital of Ohio.
• The whole is greater than the part.
• Common Knowledge inforgraphic

If you have any doubts or questions, ask your professor or librarian. Err on the side of caution: when in doubt, cite!

The online guide Citing Your Sources provides information on citation, style guides, citation tools, and more.

• Ask a Question (UC Libraries form) Email you reference question and get a response within 24 hours.
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Email: [email protected]

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Submit your work (submit a paper of six double-spaced pages or less and get  feedback from a tutor within 24-48 hours)

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Citing Your Sources Guide

• MLA In-Text Citations - The Basics
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• MLA Works Cited List - The Basics
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• Chicago/Turabian in-text citations
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MLA In-text Citations - The Basics

In MLA, referring to the works of others within text of your paper is done using  parenthetical citations . This means placing relevant source information in parentheses whenever a sentence uses a quotation or paraphrase. Usually, the simplest way is to put all of the source information in parentheses at the end of the sentence (i.e., just before the period). However, as seen below, there are situations where it makes sense to put the parenthetical elsewhere in the sentence, or even to leave information out.

General Guidelines

• upon the source medium (e.g. print, web, DVD)
• upon the source’s entry on the Works Cited page.
• Any source information that you provide in-text must correspond to the source information on the Works Cited page. More specifically, whatever signal word or phrase you provide to your readers in the text must be the first thing that appears on the left-hand margin of the corresponding entry on the Works Cited page. This is so your reader can connect your in-text citation to the right line in your Works cited page.
• Be sure to check the full selection of examples for in-text citations below, they vary slightly depending on the type of source you are citing.

MLA in-text citations

MLA format follows the author-page method of in-text citation. This means that the author's last name and the page number(s) from which the quotation or paraphrase is taken must appear in the text, and a complete reference should appear on your Works Cited page. The author's name may appear either in the sentence itself or in parentheses following the quotation or paraphrase, but the page number(s) should always appear in the parentheses, not in the text of your sentence. For example:

• Wordsworth stated that Romantic poetry was marked by a "spontaneous overflow of powerful feelings" (263).
• Romantic poetry is characterized by the "spontaneous overflow of powerful feelings" (Wordsworth 263).
• Wordsworth extensively explored the role of emotion in the creative process (263).

Both citations in the examples above, (263) and (Wordsworth 263), tell readers that the information in the sentence can be located on page 263 of a work by an author named Wordsworth. If readers want more information about this source, they can turn to the Works Cited page, where, under the name of Wordsworth, they would find the following information:

• Wordsworth, William.  Lyrical Ballads . Oxford UP, 1967.

While the above is the general rule, there are some variations depending on the source of the quote or paraphrase. Here are a few examples, but please review the MLA Manual of Style for more detailed and specific information about in-text citations.

In-text citations by type

• Print Sources - Known author
• Print Sources - Corporate author
• Print Sources - No known author
• Classic works with multiple editions
• Works in an anthology
• Multiple authors
• Multiple works by same author
• Multivolume works
• Web sources

For print sources like books, magazines, scholarly journal articles, and newspapers, provide a signal word or phrase (usually the author’s last name) and a page number. If you provide the signal word/phrase in the sentence, you do not need to include it in the parenthetical citation.

• Human beings have been described by Kenneth Burke as "symbol-using animals" (3).
• Human beings have been described as "symbol-using animals" (Burke 3).

These examples must correspond to an entry that begins with Burke, which will be the first thing that appears on the left-hand margin of an entry on the Works Cited page:

• Burke, Kenneth.  Language as Symbolic Action: Essays on Life, Literature, and Method . University of California Press, 1966.

When a source has a corporate author, it is acceptable to use the name of the corporation followed by the page number for the in-text citation. You should also use abbreviations (e.g., nat'l for national) where appropriate, so as to avoid interrupting the flow of reading with overly long parenthetical citations.

• Climate change is now "an important factor in developing new engineering systems" (EPA 321).
• The EPA has stated in a recent study, Climate change is now " an important factor in developing new engineering systems" (321). 

When a source has no known author, use a shortened title of the work instead of an author name, following these guidelines.

• Place the title in quotation marks if it's a short work (such as an article), or italicize it if it's a longer work (e.g. plays, books, television shows, entire Web sites) and provide a page number if it is available.

Titles that are longer than a standard noun phrase should be shortened into a noun phrase by excluding articles. For example,  To the Lighthouse  would be shortened to just  Lighthouse .

If the title cannot be easily shortened into a noun phrase, the title should be cut after the first clause, phrase, or punctuation:

• The world needs to act to reverse climate change, because it "is here, and it’s causing a wide range of impacts that will affect virtually every human on Earth in increasingly severe ways. . . ." ("Climate Impacts").

In this example, since the reader does not know the author of the article, an abbreviated title appears in the parenthetical citation, and the full title of the article appears first at the left-hand margin of its respective entry on the Works Cited page. Thus, the writer includes the title in quotation marks as the signal phrase in the parenthetical citation in order to lead the reader directly to the source on the Works Cited page. The Works Cited entry appears as follows:

• "Climate Impacts."  Union of Concerned Scientists . 2022. www.ucsusa.org/climate/impacts. Accessed 24 Mar. 2022.

If the title of the work begins with a quotation mark, such as a title that refers to another work, that quote or quoted title can be used as the shortened title. The single quotation marks must be included in the parenthetical, rather than the double quotation.

Page numbers are always required, but additional information can help literary scholars, who may have a different edition of a classic work, like Marx and Engels's  The Communist Manifesto .

In these cases, give the page number from your edition (making sure the edition is listed in your Works Cited page, of course) followed by a semicolon, and then the appropriate abbreviations for volume (vol.), book (bk.), part (pt.), chapter (ch.), section (sec.), or paragraph (par.). For example:

• Marx and Engels described human history as marked by class struggles (79; ch. 1).

When you cite a work that appears inside a larger source (for instance, an article in a periodical or an essay in a collection), cite the author of the  internal  source (i.e., the article or essay). For example, to cite Albert Einstein's article "A Brief Outline of the Theory of Relativity," which was published in  Nature  in 1921, you might write something like this:

• Relativity's theoretical foundations can be traced to earlier work by Faraday and Maxwell (Einstein 782).

For a source with two authors, list the authors’ last names in the text or in the parenthetical citation:

• Best and Marcus argue that one should read a text for what it says on its surface, rather than looking for some hidden meaning (9).
• The authors claim that surface reading looks at what is “evident, perceptible, apprehensible in texts” (Best and Marcus 9).

For a source with three or more authors, list only the first author’s last name, and replace the additional names with et al (which means "and others")

• According to Franck et al., “Current agricultural policies in the U.S. are contributing to the poor health of Americans” (327).
• The authors claim that one cause of obesity in the United States is government-funded farm subsidies (Franck et al. 327).

If you cite more than one work by an author, include a shortened title for the particular work from which you are quoting to distinguish it from the others. Put short titles of books in italics and short titles of articles in quotation marks.

Citing two articles by the same author:

• Lightenor has argued that computers are not useful tools for small children ("Too Soon" 38), though he has acknowledged elsewhere that early exposure to computer games does lead to better small motor skill development in a child's second and third year ("Hand-Eye Development" 17).

Citing two books by the same author:

• Murray states that writing is "a process" that "varies with our thinking style" ( Write to Learn  6). Additionally, Murray argues that the purpose of writing is to "carry ideas and information from the mind of one person into the mind of another" ( A Writer Teaches Writing  3).

**Additionally, if the author's name is not mentioned in the sentence, format your citation with the author's name followed by a comma, followed by a shortened title of the work, and, when appropriate, the page number(s):

• Visual studies, because it is such a new discipline, may be "too easy" (Elkins, "Visual Studies" 63).

If you cite from different volumes of a multivolume work, always include the volume number followed by a colon. Put a space after the colon, then provide the page number(s). (If you only cite from one volume, provide only the page number in parentheses.)

• . . . as Quintilian wrote in  Institutio Oratoria  (1: 14-17).

In your first parenthetical citation referencing the bible, you want to make clear which bible you're using (and underline or italicize the title), as each version varies in its translation, followed by book (do not italicize or underline), chapter, and verse. For example:

• Ezekiel saw "what seemed to be four living creatures," each with faces of a man, a lion, an ox, and an eagle ( New Jerusalem Bible , Ezek. 1.5-10).

If future references are to the same edition of the bible you’re using, list only the book, chapter, and verse in the parenthetical citation:

• John of Patmos echoes this passage when describing his vision (Rev. 4.6-8).

For electronic and Internet sources, follow the following guidelines:

• Include in the text the first item that appears in the Work Cited entry that corresponds to the citation (e.g. author name, article name, website name, film name).
• Do not provide paragraph numbers or page numbers based on your Web browser’s print preview function.
• Unless you must list the Web site name in the signal phrase in order to get the reader to the appropriate entry, do not include URLs in-text. Only provide partial URLs such as when the name of the site includes, for example, a domain name, like  CNN.com  or  Forbes.com,  as opposed to writing out http://www.cnn.com or http://www.forbes.com.
• One online film critic stated that  Fitzcarraldo  "has become notorious for its near-failure and many obstacles" (Taylor, “Fitzcarraldo”)
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Citing Sources: Which citation style should I use?

The citation style you choose will largely be dictated by the discipline in which you're writing. For many assignments your instructor will suggest or require a certain style. If you're not sure which one to use, it's always best to check with your instructor or, if you are submitting a manuscript, the publisher to see if they require a certain style. In many cases, you may not be required to use any particular style as long as you pick one and use it consistently. If you have some flexibility, use the guide below to help you decide.

Disciplinary Citation Styles

• Social Sciences
• Sciences & Medicine
• Engineering

When in doubt, try: Chicago Notes

• Architecture & Landscape Architecture → try Chicago Notes or Chicago Author-Date
• Art → try Chicago Notes
• Art History → use  Chicago Notes
• Dance → try Chicago Notes or MLA
• Drama → try Chicago Notes or MLA
• Ethnomusicology → try Chicago Notes
• Music → try Chicago Notes
• Music History → use  Chicago Notes
• Urban Design & Planning → try Chicago Notes or Chicago Author-Date

When in doubt, try: MLA

• Cinema Studies → try MLA
• Classics → try Chicago Notes
• English → use  MLA
• History → use   Chicago Notes
• Linguistics → try MLA
• Languages → try MLA
• Literatures → use  MLA
• Philosophy → try MLA
• Religion → try Chicago Notes

When in doubt, try: APA or Chicago Notes

• Anthropology → try Chicago Author-Date
• Business → try APA (see also Citing Business Information from Foster Library)
• Communication → try APA
• Criminology & Criminal Justice → try Chicago Author-Date
• Economics → try APA
• Education → try APA
• Geography → try APA
• Government & Law (for non-law students) → try Chicago Notes
• History → try Chicago Notes
• Informatics → try APA
• Law (for law students) → use Bluebook
• Library & Information Science → try APA
• Museology → try Chicago Notes
• Political Science → try Chicago Notes
• Psychology → use  APA
• Social Work → try APA
• Sociology → use  ASA or Chicago Author-Date

When in doubt, try: CSE Name-Year or CSE Citation-Sequence

• Aquatic & Fisheries Sciences → try CSE Name-Year or APA
• Astronomy → try AIP or CSE Citation-Sequence
• Biology & Life Sciences → try CSE Name-Year or APA
• Chemistry → try ACS
• Earth & Space Sciences → try CSE Name-Year or APA
• Environmental Sciences → try CSE Name-Year or APA
• Forest Sciences → try CSE Name-Year or APA
• Health Sciences: Public Health, Medicine, & Nursing → use AMA or NLM
• Marine Sciences → try CSE Name-Year or APA
• Mathematics → try AMS or CSE Citation-Sequence
• Oceanography → try CSE Name-Year or APA
• Physics → try AIP or CSE Citation-Sequence
• Psychology  → use  APA

When in doubt, try: CSE Name-Year or IEEE

• Aeronautics and Astronautics → try CSE Citation-Sequence
• Bioengineering → try AMA or NLM
• Chemical Engineering → try ACS
• Civil and Environmental Engineering → try CSE Name-Year
• Computational Linguistics → try CSE Citation-Sequence
• Computer Science & Engineering → try IEEE
• Electrical and Computer Engineering → try IEEE
• Engineering (general) → try IEEE or CSE Name-Year
• Human Centered Design & Engineering → try IEEE
• Human-Computer Interaction + Design → try IEEE
• Industrial and Systems Engineering → try CSE Name-Yea r
• Mechanical Engineering → try Chicago Notes or Chicago Author-Date

See also: Additional Citation Styles , for styles used by specific engineering associations.

Pro Tip: Citation Tools Save Time & Stress!

If you’re enrolled in classes that each require a different citation style, it can get confusing really fast! The tools on the Quick Citation Generators section can help you format citations quickly in many different styles.

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Citing Sources

• What Information Should be Cited and Why?
• Intentional & Unintentional Plagiarism
• Tips for Avoiding Plagiarism
• Resources & Help
• APA Style -- 7th edition (2019)
• In-text Citations
• Formatting your Paper
• Works Cited List
• Websites & Web Materials
• Chicago Style

• What are the library hours?
• How do I take materials out of the libraries? To check out materials, go to the front desk (check out desk) at the Library. You'll need your Holy Family ID card.
• How do I access the databases to find articles from off campus? Sign-In using the same log-in as your Canvas account.
• What do I do if full text is not available in a database? Our databases include abstracts (summaries) and selected full text of articles. If the full-text article is not available in one database, it may be available in another. Search the Publication Finder by journal title to see which database includes the full text.
• How can I get items from another library when Holy Family does not have what I need? If we don't have the item that you need in our collection, we can request it for you from another library. Fill out an Interlibrary Loan request form.
• How do I cite in APA, MLA or Chicago style? See our citation guides for examples of citation in various citation styles.
• How does faculty request library instruction for a class?
• If a professor says they have a book on reserve in the Library, what does that mean? Instructors can place items on reserve in the Library for their class using a Library service called "Course Reserve." Click the link for more information regarding this service.

Why Do We Cite Our Research?

Sources of information are cited in order to give the original authors/creators proper credit for their work and to document where an author heard or read the fact or idea that has been incorporated into a new work. The purpose of citations is to let the reader know where you obtained information so sources can easily be located and consulted.

Because knowledge is a cumulative process built on the research and writing of other researchers, your instructor needs to see the quality of the sources you used and how you developed your ideas.

To get started and to see examples, select the citation style from the dropdown menu on the left.

What Information Should Be Cited and Why?

In general, you must document sources when you provide information that you ordinarily would not have known before conducting your research, and when you provide information that it cannot be assumed the reader knows. You must cite a reference when you:

• Discuss, summarize, or paraphrase the ideas of an author
• Provide a direct quotation
• Use statistical or other data
• Use images, graphics, videos, and other media

While you are doing research and locating sources, be sure to document materials thoroughly, noting the author, title, publisher, place of publication, date, and page numbers of all sources used. For electronic materials, you should also note the DOI number (Digital Object Identifier) if available. Note the URL of any website you consult; depending on the source, you may need it for reference.

APA style no longer requires a database name for most references; MLA style still requires it as part of your citation. In either case, make a note of it in case you need to retrieve it at a later date.

Common Knowledge

Things that are common knowledge do not require citation. For example:

• Social networking sites such as Facebook allow people to communicate easily regardless of their location. (does not require citation)
• The Japanese navy attacked Pearl Harbor on December 7, 1941. (does not require citation)

However, if someone draws an original conclusion from a common fact, then you must cite the source:

• The ability to share real-time news and video with the world via social networking sites has emboldened student movements in countries where there is very little freedom of the press. (requires citation)
• Japan's failure to sink any U.S. aircraft carriers in the otherwise devastating attack on Pearl Harbor assured Japan's eventual defeat. (requires citation)

Also, common sayings or proverbs need not be cited:

• "The early bird gets the worm." (common expression with no distinct origin)

Below is a famous saying you might recognize, but it's actually from a poem by Sir Walter Scott. If you read this in a book, of course, you would cite the book. If you already knew this expression, you should still give Sir Walter Scott credit for it because it has a distinct and identifiable origin.

• "Oh, what a tangled web we weave when first we practice to deceive."

Getting started

We understand that citing your sources can be a little confusing, but it doesn't have to be overwhelming. Before you start, ask yourself these questions:

1. What type of source am I trying to cite?

• Journal article? Book? Webpage?

2. Where did I retrieve that source?

• Library database? Website? Was it a print source?

3. What citation style am I supposed to use for my assignment?

Once you've answered these questions, select the most appropriate option from either the  APA  or  MLA  dropdown menu.

To request a one-on-one consultation with a librarian to begin research on a paper, find sources, or review the APA/MLA formatting of their paper and/or references please make an appointment with us through our online web form . We offer both online and in-person options

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