Cita APA (7a ed.)

Wittich, W. A. (1953). Audiovisual Materials: Their Nature and Use (4a. ed.). A Harper International.

Cita Chicago Style (17a ed.)

Wittich, Walter Arno. Audiovisual Materials: Their Nature and Use. 4a. ed. New York: A Harper International, 1953.

Cita MLA (8a ed.)

Wittich, Walter Arno. Audiovisual Materials: Their Nature and Use. 4a. ed. A Harper International, 1953.