APA-referens (7:e uppl.)

Wittich, W. A. (1958). Audivisual materials: Their nature and use. Harper y Row.

Chicago-referens (17:e uppl.)

Wittich, Walter A. Audivisual Materials: Their Nature and Use. New York: Harper y Row, 1958.

MLA-referens (9:e uppl.)

Wittich, Walter A. Audivisual Materials: Their Nature and Use. Harper y Row, 1958.