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What is the serial comma in APA Style?

Last Updated: Jul 31, 2017  |  231 Views
Topics: Punctuation

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The serial comma refers to the comma that appears before the last item in a list of three or more items. According to the American Psychological Association (2010), authors should provide a comma, "between elements (including before and and or) in a series of three or more items:


the height, width, or depth

in a study by Stacy, Newcomb, and Bentler (1991)


in a study by Stacy, Newcomb and Bentler (1991)" (p. 88).


American Psychological Association. (2010). Publication manual of the American Psychological Association (6th ed.). Washington, DC: Author. 

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