APA (7th ed.) Citation

Ewen, R. B. (1980). An introduction to theories of personality. Academic Press.

Chicago Style (17th ed.) Citation

Ewen, Robert B. An Introduction to Theories of Personality. New York: Academic Press, 1980.

MLA (9th ed.) Citation

Ewen, Robert B. An Introduction to Theories of Personality. Academic Press, 1980.