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शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रTime. Time Great Events of the 20th Century. New York: Time Books, 1997.
एमएलए (9वां संस्करण) प्रशस्ति पत्रTime. Time Great Events of the 20th Century. Time Books, 1997.
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