Hilgard, E. R. (1956). Theories of learning (2nd ed.). Appleton-Century-Crofts.
Chicago Style (17th ed.) CitationHilgard, Ernest R. Theories of Learning. 2nd ed. New York: Appleton-Century-Crofts, 1956.
MLA (9th ed.) CitationHilgard, Ernest R. Theories of Learning. 2nd ed. Appleton-Century-Crofts, 1956.