APA (7th ed.) Citation

Ryckman, R. M. (2000). Theories of personality (7. ed.). Wadsworth.

Chicago Style (17th ed.) Citation

Ryckman, Richard M. Theories of Personality. 7. ed. Belmont, Calif. [u.a.]: Wadsworth, 2000.

MLA (9th ed.) Citation

Ryckman, Richard M. Theories of Personality. 7. ed. Wadsworth, 2000.