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Citation Styles: APA

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Table 6.1. Basic Citation Styles from Publication Manual of the American Psychological Association
Type of citation  First citation in text Subsequent citations in text  Parenthetical format, first citation in text Parenthetical format, subsequent citations in text
One work by one author Walker (2007) Walker (2007) (Walker, 2007) (Walker, 2007)
One work by two authors Walker and Allen (2004) Walker and Allen (2004) (Walker & Allen, 2004) (Walker & Allen, 2004)
One work by three authors Bradley, Ramirez, and Soo (1999) Bradley et al. (1999) (Bradley, Ramirez, & Soo, 1999) (Bradley et al., 1999)
One work by four authors Bradley, Ramirez, Soo, and Walsh (2006) Bradley et al. (2006) (Bradley, Ramirez, Soo, & Walsh, 2006) (Bradley et al., 2006)
One work by five authors Walker, Allen, Bradley, Ramirez, and Soo (2008) Walker et al. (2008) (Walker, Allen, Bradley, Ramirez, & Soo, 2008) (Walker et al., 2008)
One work by six or more authors Wasserstein et al. (2005) Wasserstein et al. (2005) (Wasserstein et al., 2005) (Wasserstein et al., 2005)
Groups (readily identified through abbreviations) as authors National Institute of Mental Health (NIMH, 2003) NIMH (2003) (National Institute of Mental Health [NIMH], 2003) (NIMH, 2003)
Groups (no abbreviation) as authors University of Pittsburgh (2005) University of Pittsburgh (2005) (University of Pittsburgh, 2005) (University of Pittsburgh, 2005)


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