APA (7th ed.) Citation

Ryckman, R. M. (1993). Theories of personality (5. ed.). Brooks/Cole.

Chicago Style (17th ed.) Citation

Ryckman, Richard M. Theories of Personality. 5. ed. Pacific Grove, Calif: Brooks/Cole, 1993.

MLA (9th ed.) Citation

Ryckman, Richard M. Theories of Personality. 5. ed. Brooks/Cole, 1993.