The Writing Center @ The University of Wisconsin - Madison
The Writer's Handbook
APA Documentation Guide

Cite a source with one author

First and subsequent citations

Within a paragraph, omit the year in citations after the first one if no confusion with other studies will result

Fisher (1999) administered a questionnaire . . . Fisher's results indicated . . .

[new paragraph] The questionnaire administered by Fisher (1999) was used by . . .

A source with 1 or 2 authors

Cite name(s) in first and all subsequent citations

(Carter & Dunbar-Odom, 2009)

Carter and Dunbar-Odom (2009)

Authors with same surname

Use initials even if the years are different

D. Baldwin (2001) and M. L. Baldwin (1999)