Não informado. (2021). Communications Engineering & Design. International Thomson Communication.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Communications Engineering & Design. Denver, Colo: International Thomson Communication, 2021.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Communications Engineering & Design. International Thomson Communication, 2021.
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