Hjelle, L. A., & Ziegler, D. J. (1992). Personality theories: Basic assumptions, research, and applications (3rd.ed.). McGraw-hill.
Lua i Stíl Chicago (17ú heag.)Hjelle, Larry A., agus Daniel J. Ziegler. Personality Theories: Basic Assumptions, Research, and Applications. 3rd.ed. New York: McGraw-hill, 1992.
Lua MLA (9ú heag.)Hjelle, Larry A., agus Daniel J. Ziegler. Personality Theories: Basic Assumptions, Research, and Applications. 3rd.ed. McGraw-hill, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.