APA-referens (7:e uppl.)

Hill, W. F. (1997). Learning: A survey of psychological interpretations (6th ed.). Longman.

Chicago-referens (17:e uppl.)

Hill, Winfred F. Learning: A Survey of Psychological Interpretations. 6th ed. New York: Longman, 1997.

MLA-referens (9:e uppl.)

Hill, Winfred F. Learning: A Survey of Psychological Interpretations. 6th ed. Longman, 1997.