Answered By: Jennifer Harris
Last Updated: Apr 06, 2016     Views: 708

Each citation style handles this situation a little bit differently! Here are specific examples of how it works in the three major citation styles:

APA Style

Per the APA Manual (6th edition), p. 178:

For In-Text Citations:

Arrange two or more works by the same authors (in the same order) by year of publication. Place in-press citations last. Give the authors’ surnames once; for each subsequent work, give only the date.

Training materials are available (Department of Veterans Affairs, 2001, 2003)

Past research (Gogel, 1990, 2006, in press)

Identify works by the same author (or by the same two or more authors in the same author) with the same publication date by the suffixes a, b, c, and so forth, after the year; repeat the year. The suffixes are assigned in the reference list, where these kinds of references are ordered alphabetically by title (of the article, chapter or complete work).

Several studies (Derryberry & Reed, 2005a, 2005b, in press-a; Rothbart, 2003a, 2003b)

For additional examples and tips on citing multiple sources by the same author in APA Style, check out the APA Style Blog’s posts on How to Cite Multiple Works by the Same Author in a Compilation and How to Cite Articles with the Same Authors and Same Year, or the Purdue OWL (Reference List, In-Text Citations).

MLA Style

Per the MLA Handbook (7th edition), p. 133 and 225:

To cite two or more works by the same author, give the name in the first entry only. Thereafter, in place of the name, type three hyphens, followed by a period and the title. The three hyphens stand for exactly the same name as in the preceding entry. This sort of label does not affect the order in which the entries appear; works listed under the same name are alphabetized by title.

In a parenthetical reference to one of two or more works by the same author, put a comma after the author’s last name and add the title of the work (if brief) or a shortened version and the relevant page reference: “(Frye, Double Vision 85),” “(Durant and Durant, Age 214-48).” If you state the author’s name in the text, give only the title and page reference in parentheses: “(Double Vision 85),” “(Age 214-48).” If you include both the author’s name and the title in the text, indicate only the pertinent page number or numbers in parentheses: “(85),” “(214-48).”

Shakespeare’s King Lear has been called a “comedy of the grotesque” (Frye, Anatomy 237).

For Northrop Frye, one’s death is not a unique experience, for “every moment we have lived through we also died out of into another order” (Double Vision 85).

Works Cited List (don't forget to indent the second and subsequent lines):

Frye, Northrup. Anatomy of Criticism: Four Essays. Princeton: Princeton UP, 1957. Print

---. The Double Vision: Language and Meaning in Religion. Toronto: U of Toronto P, 1991. Print.

For additional examples and tips on multiple sources by the same author in MLA Style, check out the Purdue OWL (Works Cited, Parenthetical Reference).

Chicago Style

Per the Chicago Manual of Style (16th edition):

Notes and Bibliography method (p. 691-693) (don't forget to indent the second and subsequent lines):

For successive entries [in a bibliography] by the same author, editor, translator, or compiler, a 3-em dash (followed by a period or comma, depending on the presence of an abbreviation such as ed.) replaces the name after the first appearance.

Judt, Tony. A Grand Illusion? An Essay on Europe. New York: Hill and Wang, 1996.

———. Reappraisals: Reflections on the Forgotten Twentieth Century. New Yrok: Penguin Press, 2008.

In a bibliography, titles by the same author are normally listed alphabetically.

Author-Date References (p. 801) (don't forget to indent the second and subsequent lines):

For successive entries by the same author(s), translator(s), editor(s), or compiler(s), a 3-em dash replaces the name(s) after the first appearance. The entries are arranged chronologically by year of publication in ascending order, not alphabetized by title. Undated works designated n.d. or forthcoming follow all dated works.

Schuman, Howard, and Jacqueline Scott. 1987. “Problems in the Use of Survey Questions to  Measure Public Opinion.” Science 236:957-59.

———. 1989. “Generations and Collective Memories.” American Sociological Review 54:359-81.

Two or more works by the same author in the same year must be differentiated by the addition of a, b, and so forth (regardless of whether they were authored, edited, compiled or translated), and are listed alphabetically by title. Text citations consist of author and year plus letter.

Fogel, Robert William. 2004a. The Escape from Hunger and Premature Death, 1700-2100: Europe, America, and the Third World. New York: Cambridge University Press, 2004.

———. 2004b. ”Technophysio Evolution and the Measurement of Economic Growth.” Journal of Evolutionary Economics 14 (2): 217-21. Doi:10.1007/s00191-004-0188-x.          

(Fogel 2004b, 218)

(Fogel 2004a, 45-46)

For additional information on citing on multiple sources by the same author in Chicago Style, check out the Sample Papers on the Purdue OWL.

For more information and examples for citations, see our Citing Your Sources research guide.  You may also want to contact the Learning Center (UC Students) or Online Writing Center (COCE Students) for additional information.

This information is intended to be a guideline, not expert advice. Please be sure to speak to your professor about the appropriate way to cite multiple sources by the same author in your class assignments and projects.

You may also want to consider:

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