APA (7th ed.) Zitazioa
Gregory, R. J. (2015). Psychological testing: History, principles, and applications (7th ed.). Pearson.
Chicago Style (17th ed.) Zitazioa
Gregory, Robert J. Psychological Testing: History, Principles, and Applications. 7th ed. Harlow, England: Pearson, 2015.
MLA (9th ed.) Zitazioa
Gregory, Robert J. Psychological Testing: History, Principles, and Applications. 7th ed. Pearson, 2015.
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