Hilgard, E. R. (1958). Theories of learning (2nd ed.). Methuen.
Chicago Style (17. basım) AtıfHilgard, Ernest R. Theories of Learning. 2nd ed. London: Methuen, 1958.
MLA (8th ed.) AtıfHilgard, Ernest R. Theories of Learning. 2nd ed. Methuen, 1958.
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