APA-referens (7:e uppl.)

Sless, D. (1981). Learning and visual communication. Croom Helm ; Wiley.

Chicago-referens (17:e uppl.)

Sless, David. Learning and Visual Communication. London : New York: Croom Helm ; Wiley, 1981.

MLA-referens (8:e uppl.)

Sless, David. Learning and Visual Communication. Croom Helm ; Wiley, 1981.