APA-referens (7:e uppl.)

Schultz, D. P., & Schultz, S. E. (2009). Theories of personality (Ninth edition.). Wadsworth/Cengage Learning.

Chicago-referens (17:e uppl.)

Schultz, Duane P., och Sydney Ellen Schultz. Theories of Personality. Ninth edition. Belmont, CA: Wadsworth/Cengage Learning, 2009.

MLA-referens (9:e uppl.)

Schultz, Duane P., och Sydney Ellen Schultz. Theories of Personality. Ninth edition. Wadsworth/Cengage Learning, 2009.