Παραπομπή APA

Gregory, R. J. (2017). Psychological testing: : history, principles and applications (7th ed.). Pearson India.

Παραπομπή Chicago Style

Gregory, Robert J. Psychological Testing: : History, Principles and Applications. 7th ed. Noida: Pearson India, 2017.

Παραπομπή MLA

Gregory, Robert J. Psychological Testing: : History, Principles and Applications. 7th ed. Pearson India, 2017.