Não informado. (2004). International communications review. International Telephone and Telegraph Corporation.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. International Communications Review. New York: International Telephone and Telegraph Corporation, 2004.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. International Communications Review. International Telephone and Telegraph Corporation, 2004.
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