Do You Cite the Same Source Multiple Times in APA Format?

Updated July 21, 2017

One or Two Authors

If a source has one author, all citations are done one of two ways. The last name of the author can be mentioned in the text with the publication year in parentheses, such as "Doe (2010) found that ... ." With two authors, both names are listed: "Smith and Jones (2013) ... ." With the second option, the author's last name, a comma and the year are placed within parentheses after the pertinent information. If there are two authors, the names are separated by an ampersand, such as (Smith & Jones, 2013).

Three to Five Authors

The first time a citation occurs, all the authors' last names are listed. Within the text, the publication year is included within parentheses, such as "Alpha, Bravo, Charlie, Delta, and Echo (2001) determined that ... ." Alternately, the names are within parentheses, separated by commas, except for the last one, where an ampersand is used. A comma is followed by the year. All subsequent citations include just the first author's name followed by "et al" (for "et alia," or "and others"), a comma and the year.

Six Authors

If a source has six or more authors, the same formats are used for all citations. The first author's name is listed within text followed by "et al." The publication year is placed inside parentheses. A variation places that same author information, a comma and the year inside parentheses.

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About the Author

Living in upstate New York, Susan Sherwood is a researcher who has been writing within educational settings for more than 10 years. She has co-authored papers for Horizons Research, Inc. and the Capital Region Science Education Partnership. Sherwood has a Ph.D. in curriculum and instruction from the University at Albany.