APA (7th ed.) Citation

Hilgard, E. R. (1948). Theories of learning. Appleton-Century-Crofts.

Chicago Style (17th ed.) Citation

Hilgard, Ernest R. Theories of Learning. New York: Appleton-Century-Crofts, 1948.

MLA (9th ed.) Citation

Hilgard, Ernest R. Theories of Learning. Appleton-Century-Crofts, 1948.