Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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