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HSA 3111 APA Support: Multiple Authors

HSA 3111 & 4850


Single Author: 

Author Last Name, First Initial. (Year). Book title: Subtitle. Publisher. 


Westover, T. (2018). Educated: A memoir. Random House. 

Two Authors: 

Author Last Name, First Initial. Second Initial. & Author Last Name, First Initial. Second Initial. (Year). Book title: Subtitle. Publisher.


D’Amico, D. & Barbarito, C. (2016). Health and physical assessment in nursing (3rd ed.). Pearson. 

Three to Twenty Authors:

All the authors must be listed up to twenty in the format of Author Last Name, First Initial. Second Initial., all separated by commas, with an ampersand before the last author. The rest of the citation is the same as single or two authors. 


London, M. L., Wieland Ladewig, P. A., Davidson, M. R., Ball, J. W., McGillis Bindler, R. C., & Cowen, K. J. (2017). Maternal and child        nursing care (5th ed.). Pearson. 

Note: If more than twenty authors, put down the first nineteen, then an ellipsis (..), and last author (no ampersand). There should be no more than twenty total authors in a reference.

In-Text citations

Single Author: 

(Author Last Name, Year)


“Writing activities increase students’ learning and engagement” (Huskin, 2016). 

Two Authors:

(Author Last Name & Author Last Name, Year)


(D'Amico & Barbarito, 2016) -parenthetical

D'Amico and Barbarito (2016) state... -narrative

*note: use the "&" in parenthetical citation, use "and" in narrative

Three and More Authors:

(Author Last Name et al., Year)


(Landon et al., 2017). -parenthetical

Landon et al. (2017) write... -narrative

Same Author, Same Year

Multiple works by same author, same year

If you are using more than one reference by the same author—or the same group of authors listed in the same order—published in the same year, first check to see if they have more specific dates (this recommendation is new to APA 7). Works with only a year should be listed before those with a more specific date. List specific dates chronologically.  If two works have the same publication date, organize them in the reference list alphabetically by the title of the article or chapter. If references with the same date are identified as parts of a series (e.g. Part 1 and Part 2), list them in order of their place in the series. Then assign letter suffixes to the year. Refer to these sources in your essay as they appear in your reference list, e.g.: "Berndt (2004a) makes similar claims..."

Berndt, T. J. (2004a).  Children’s friendships: Shifts over a half-century in perspectives on their development and their effects.  Merrill Palmer Quarterly, 50(3)206-223.

Berndt, T. J. (2004b).  Friendship and three A’s (aggression, adjustment, and attachment).  Journal of Experimental Child Psychology, 88(1), 1-4.

From: Purdue OWL APA7 reference_list_author_authors.html