Gaya APA

Hjelle, L, A., Ziegler, D, J. (1992). Personality theories : basic assumptions, research, and applications (Ed.3). New York: McGraw-Hill.

Gaya MLA

Hjelle, Larry, A.., Ziegler, Daniel, J.. "Personality theories : basic assumptions, research, and applications". Ed.3 New York: McGraw-Hill, 1992. Text.