APA (7th ed.) Citation

Clarkin, J. F., & Lenzenweger, M. F. (1996). Major theories of personality disorder. Guilford Press.

Chicago Style (17th ed.) Citation

Clarkin, John F., and Mark F. Lenzenweger. Major Theories of Personality Disorder. New York: Guilford Press, 1996.

MLA (9th ed.) Citation

Clarkin, John F., and Mark F. Lenzenweger. Major Theories of Personality Disorder. Guilford Press, 1996.