LeFrancois, G. R. (1983). Psychology (2nd ed.). Wadsworth Publishing Co.
Lua i Stíl Chicago (17ú heag.)LeFrancois, Guy R. Psychology. 2nd ed. Belmont, California: Wadsworth Publishing Co, 1983.
Lua MLA (9ú heag.)LeFrancois, Guy R. Psychology. 2nd ed. Wadsworth Publishing Co, 1983.
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