Cita APA (7a ed.)

Hilgard, E. R., & Bower, G. H. (1956). Theories of learning (2nd ed.). Appleton-Century-Crofts.

Cita Chicago Style (17a ed.)

Hilgard, Ernest R., y Gordon H. Bower. Theories of Learning. 2nd ed. New York: Appleton-Century-Crofts, 1956.

Cita MLA (9a ed.)

Hilgard, Ernest R., y Gordon H. Bower. Theories of Learning. 2nd ed. Appleton-Century-Crofts, 1956.