Darley, J. M., Glucksberg, s., & Kinchla, R. A. (1991). Psychology (5th ed.). Prentice-Hall.
Tohutoru Kātū Chicago (17th ed.)Darley, John M., sam Glucksberg, me Ronald A. Kinchla. Psychology. 5th ed. Englewood cliffs: Prentice-Hall, 1991.
Tohutoro MLA (9th ed.)Darley, John M., et al. Psychology. 5th ed. Prentice-Hall, 1991.
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