Cita APA

Wittich, W. A. 1., & Schuller, C. F. (1957). Audio-visual materials: Their nature and use (2. edition --.). New York, New York: Harper.

Citación estilo Chicago

Wittich, Walter Arno 1910-, y Charles Francis Schuller. Audio-visual Materials: Their Nature and Use. 2. edition --. New York, New York: Harper, 1957.

Cita MLA

Wittich, Walter Arno 1910-, y Charles Francis Schuller. Audio-visual Materials: Their Nature and Use. 2. edition --. New York, New York: Harper, 1957.