APA (7th ed.) Citation
Hilgard, E. R., & Bower, G. H. (1956). Theories of learning (2nd ed.). Appleton-Century-Crofts.
Chicago Style (17th ed.) Citation
Hilgard, Ernest R., and Gordon H. Bower. Theories of Learning. 2nd ed. New York: Appleton-Century-Crofts, 1956.
MLA (9th ed.) Citation
Hilgard, Ernest R., and Gordon H. Bower. Theories of Learning. 2nd ed. Appleton-Century-Crofts, 1956.
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