Gaya APA

Friedman, H, S., Schustack, M, W. (2011). Personality : Classic Theories and Modern Research 4'th Ed. (4). Boston: Pearson Education.

Gaya MLA

Friedman, Howard, S.., Schustack, Miriam, W.. "Personality : Classic Theories and Modern Research 4'th Ed.". 4 Boston: Pearson Education, 2011. Text.