Gaya APA

Bower, G, H., Hilgard, E, R. (1981). Theories of learning (7th ed). Englewood Cliffs, NJ: Prentice Hall.

Gaya MLA

Bower, Gordon, H.., Hilgard, Ernest, R.. "Theories of learning". 7th ed Englewood Cliffs, NJ: Prentice Hall, 1981. Text.