Cita APA (7th ed.)

Engler, B. (2006). Personality theories: An introduction (Seventh edition.). Houghton Mifflin Company.

Cita Chicago (17th ed.)

Engler, Barbara. Personality Theories: An Introduction. Seventh edition. Boston: Houghton Mifflin Company, 2006.

Cita MLA (9th ed.)

Engler, Barbara. Personality Theories: An Introduction. Seventh edition. Houghton Mifflin Company, 2006.