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.
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