Gaya APA

Gregory, R, J. (2008). Psychological testing : History, principles, and applications (2nd Impression). New Delhi: Dorling Kindersley India Pvt.Ltd.,Licensees of Pearson Education in South Asia.

Gaya MLA

Gregory, Robert, J.. "Psychological testing : History, principles, and applications". 2nd Impression New Delhi: Dorling Kindersley India Pvt.Ltd.,Licensees of Pearson Education in South Asia, 2008. Text.