Pula, F. J. (1968). Application and operation of audio-visual equipment in education. Wiley.
Citace podle Chicago (17th ed.)Pula, Fred John. Application and Operation of Audio-visual Equipment in Education. New York, Sydney: Wiley, 1968.
Citace podle MLA (8th ed.)Pula, Fred John. Application and Operation of Audio-visual Equipment in Education. Wiley, 1968.
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