Hergenhahn, B. R., & Olson, M. H. (2007). An introduction to theories of personality. Upper Saddle River, NJ : Pearson/Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Hergenhahn, B. R., agus Matthew H. Olson. An Introduction to Theories of Personality. Upper Saddle River, NJ : Pearson/Prentice Hall, 2007.
Lua MLA (9ú heag.)Hergenhahn, B. R., agus Matthew H. Olson. An Introduction to Theories of Personality. Upper Saddle River, NJ : Pearson/Prentice Hall, 2007.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.