Gregory, R. J. (2004). Psychological testing: History, principles, and applications (4th ed.). Pearson/A and B.
Chicago-viite (17. p.)Gregory, Robert J. Psychological Testing: History, Principles, and Applications. 4th ed. Boston: Pearson/A and B, 2004.
MLA-viite (9. p.)Gregory, Robert J. Psychological Testing: History, Principles, and Applications. 4th ed. Pearson/A and B, 2004.
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