Cita APA (7th ed.)

Hergenhahn, B. R., & Olson, M. H. (1999). An introduction to theories of personality (5th ed.). Prentice Hall.

Cita Chicago (17th ed.)

Hergenhahn, B. R., i Matthew H. Olson. An Introduction to Theories of Personality. 5th ed. Upper Saddle River, N.J: Prentice Hall, 1999.

Cita MLA (9th ed.)

Hergenhahn, B. R., i Matthew H. Olson. An Introduction to Theories of Personality. 5th ed. Prentice Hall, 1999.