Não informado. (1972). Educational and industrial television. Tepfer Publishing.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Educational and Industrial Television. Danbury, Conn: Tepfer Publishing, 1972.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Educational and Industrial Television. Tepfer Publishing, 1972.
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