Hergenhahn, B. R., & Olson, M. H. (1999). An introduction to theories of personality (5th ed.). Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Hergenhahn, B. R., agus Matthew H. Olson. An Introduction to Theories of Personality. 5th ed. Upper Saddle River, N.J: Prentice Hall, 1999.
Lua MLA (9ú heag.)Hergenhahn, B. R., agus Matthew H. Olson. An Introduction to Theories of Personality. 5th ed. Prentice Hall, 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.