Tohutoro APA (7th ed.)
Lefton, L. A., & Valvatne, L. (1986). Mastering Psychology (4th ed.). Allyn & Bacon.
Tohutoru Kātū Chicago (17th ed.)
Lefton, Lester A., me Laura Valvatne. Mastering Psychology. 4th ed. Boston: Allyn & Bacon, 1986.
Tohutoro MLA (9th ed.)
Lefton, Lester A., me Laura Valvatne. Mastering Psychology. 4th ed. Allyn & Bacon, 1986.
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