APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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