Não informado. (1979). Educational communication and technology. Association for Educational Communications and Technology.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Educational Communication and Technology. Washington: Association for Educational Communications and Technology, 1979.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Educational Communication and Technology. Association for Educational Communications and Technology, 1979.
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