Gaya APA

HJELLE, L, A., Ziegler, D, J. (1992). Personality Theories: Basic Assumption, Research and Application (Third Edition). New York: McGraw-Hill Book Company.

Gaya MLA

HJELLE, Larry, A.., Ziegler, Daniel, J.. "Personality Theories: Basic Assumption, Research and Application". Third Edition New York: McGraw-Hill Book Company, 1992. Text.