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APA Style Guide

This guide is an introduction to APA 7th edition.

Reference Page

In scholarly writing, acknowledging the sources you used to enrich your work is integral to maintaining academic integrity. Your reference page becomes a vital element, meticulously detailing each source to provide your readers with a roadmap to explore them further. You should create a citation for each source referenced in your essay.


Basic Rules

  • Your reference list should begin on a separate page from the last page of your essay.
  • Label this page "References" in bold. Do not underline or use quotation marks.
  • The title should be centered at the top of the page
  • This section should be double-spaced like the rest of your essay.
  • Each citation should be formatted wit a hanging indent, meaning that all lines after the first line of the citation should be indented one-half inch from the margin.

Citation Format

While different types of sources may require different formats, a general APA reference entry often adheres to the following structure:

Author's last name, first initial. (year). Title of article. Title of Journal, volume number(issue number), page number(s). URL address or DOI number.

This guide covers some common examples below. Always refer to MLA Style Central or the MLA Handbook for the most accurate citation guidelines.

Example:

Roby, J.L., Rotabi, K., & Bunkers, K.M. (2013). Social justice and intercountry adoptions: The role of the U.S. social work community. Social Work, 58(4), 295-303. https://doi.org/10.1093/sw/swt033

Books

Citations for books in APA Style generally use variations of the same format:

Author's Last Name, First Initial. (year). Title of book. Publisher. URL permalink, if available.

Pay close attention to the capitalization of book titles in the examples. Capitalize only the first letter of the first word. For two-part titles, capitalize the first word of the second part of the title, as well. You should also capitalize any proper nouns.

See below examples of different scenarios.

Book with One Author

Last Name, Initials. (year). Title of book. Publisher

  • Smith, J.L. (2010). Exploring the world of aquatic life. Oceanic Press.

Book with 2 Authors

Last Name, First Initials, & Last Name, First Initials. (year). Title of book. Publisher.

  • Bon Tempo, C.J., & Diner, H.R. (2022). Immigration: An American history. Yale U Press. https://carlowuniversity.on.worldcat.org/oclc/1317281122

Book with 3–20 Authors

Citations for works with 3–20 authors should include all authors in the Last Name, First Initials format. Each author's last name should be separated by a comma, with an ampersand (&) before the last author represented.

Last Name1, First Initials1, Last Name2, First Initials2, Last Name3, First Initials3, & Last Name4, First Initials4. (year). Title of book. Publisher.


Book with 21+ Authors

Citations for works with 21 or more authors should include the first 19 authors in the Last Name, First Initials format. After the first 19 names, use an ellipsis (...) in place of the remaining author names. After the ellipsis, include the very last author's Last Name, First Initials. Do not use an ampersand.


Edited Book

Last Name, First Initials. (year). Title of Book. (First Initial Last Name, Ed.). Publisher.

  • Malory, T. (2017). Le morte darthur (P.J.C. Field, Ed.). D.S. Brewer. (Original work published 1469-70)

Book with Editor but no Author

Last Name, First Initials. (Ed.) (year). Title of Book. Publisher.

  • Letch, M.C., & Rushton, C.J. (Eds.). (2019). A new companion to Malory. D.S. Brewer.

Multi-Volume Work

Last Name, First Initials. (year). Title of Book Series. (Vol. #). Publisher.

  • Greenblatt, S. (Ed.). (2018). The Norton anthology of English literature: The Victorian age. (Tenth ed., Vol. E). W.W. Norton and Company.

Article of Chapter from an Edited Book

Author Last Name, First Initial. (year). Title of chapter. In E. Editor Last Name (Ed.), Title of work. (pp. pages of chapter or article). Publisher. DOI (if available)

  • Armstrong, D. (2019). Malory and character. In M.G. Leitch & C.J. Rushton (Eds.), A new companion to Malory (pp. 144-163). D.S. Brewer.

General eBook Formats

It is not necessary to distinguish the use of an eBook unless there are multiple differences between the print and digital books. You should distinguish between eBook and audiobook formats.

Last Name, Initials. (year). Title of book. Publisher. URL.

Last Name, Initials. (year). Title of book. [eBook edition]. Publisher. URL.

Last Name, Initials. (year). Title of book. (Narrator First Initial and Last Name, Narr.) [Audiobook]. Publisher. URL (if applicable).

  • Zinn, H. (2015). A people's history of the United States. [Kindle edition]. HarperCollins.
  • Zinn, H. (2009). A people's history of the United States. (J. Zinn, Narr.) [Audiobook]. HarperCollins.

Periodicals

Citations for articles in periodicals in APA Style generally use this format:

Author's Last Name, First Initial. (year). Title of article. Title of Periodical, volume number(issue number), pages. DOI

  • The title of the article should be in sentence-case, meaning that only the first letter of the first word, as well as proper nouns, should be capitalized.
  • However, the title of the journal should be capitalized the same way it appears in the publication (e.g., The Journal of the American Medical Association would appear as such).
  • Always include the volume and issue number for a journal article.
  • Always include the DOI number for an article, if available, even if citing a print journal. If no DOI is available, include the permalink URL.
  • Do not include database information, unless citing a work that is published solely within that database (e.g., information from the database UpToDate).

See below examples of different scenarios.


Citing Multiple Authors

For articles with multiple authors, see special instructions below.

  • Articles with 2 Authors

Last Name, First Initials, & Last Name, First Initials. (rest of citation)

  • Articles with 3–20 Authors

Citations for works with 3–20 authors should include all authors in the Last Name, First Initials format. Each author's last name should be separated by a comma, with an ampersand (&) before the last author represented.

Last Name1, First Initials1, Last Name2, First Initials2, Last Name3, First Initials3, & Last Name4, First Initials4. (rest of citation)

  • Articles with 21+ Authors

Citations for works with 21 or more authors should include the first 19 authors in the Last Name, First Initials format. After the first 19 names, use an ellipsis (...) in place of the remaining author names. After the ellipsis, include the very last author's Last Name, First Initials. Do not use an ampersand.


Article in a Periodical

Last Name, First Initial. (year). Title of article. Title of Journal, volume#(issue#), page range. DOI.

  • Oikawa, S., Iida, J., Ito, Y., & Nishigori, H. (2022). Cultivating cultural awareness among medical educators by integrating cultural anthropology in faculty development: an action research study. BMC Medical Education, 22, Article 196. https://doi.org/10.1186/s12909-022-03260-7

Article from UpToDate

Last Name, First Initial. (year). Title of article. UpToDate. Retrieved Month Day, Year, from Permalink.

  • Schwedt, T.J., & Garza, I. (2025). Acute treatment of migraine in adults. UpToDate. Retrieved September 17, 2025, from https://www-uptodate-com.carlow.idm.oclc.org/contents/acute-treatment-of-migraine-in-adults

Electronic Resources

YouTube Video

Person or group who uploaded the video. (Year, Month Day). Title of video [Video]. YouTube. URL

For YouTube videos, use the name of the account that uploaded the video as the author. However, if the uploader is not the person or group that created the video, note this in the citation if you cannot find an original link back to the creator.

Include the description "[Video]" after the title.

  • Scribbr. (2020, November 3). APA 7th edition: The basics of APA in-text citations [Video]. YoutTube. https://youtu.be/opp259YvaoE?si=bvg-JIYhYAH1qiwk

Page on a Website

Last Name, First Initial. (Year, Month Day). Title of page. Site Name. URL

If a date is not available, use "(n.d.)."

  • American Psychological Association. (2020, May). Webpage on a website references. APA Style. https://apastyle.apa.org/style-grammar-guidelines/references/examples/webpage-website-references