Gaya APA

Schultz, D, P., Schultz, S, E. (2017). Theories of Personality (11th Edition). United States of America: Cengage Learning..

Gaya MLA

Schultz, Duane, P.., Schultz, Sydney, Ellen. "Theories of Personality". 11th Edition United States of America: Cengage Learning., 2017. Text.