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शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAmerican Federation of Information Processing Societies. Annals of the History of Computing. New York: Springer, 1979.
एमएलए (8वां संस्करण) प्रशस्ति पत्रAmerican Federation of Information Processing Societies. Annals of the History of Computing. Springer, 1979.
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