APA (7th ed.) Citation

Schultz, D. P., & Schultz, S. E. (1998). Theories of personality (6th ed.). Brooks/Cole Pub.

Chicago Style (17th ed.) Citation

Schultz, Duane P., and Sydney Ellen Schultz. Theories of Personality. 6th ed. Pacific Grove: Brooks/Cole Pub, 1998.

MLA (9th ed.) Citation

Schultz, Duane P., and Sydney Ellen Schultz. Theories of Personality. 6th ed. Brooks/Cole Pub, 1998.