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शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAmerican Laboratory Publishing. American Laboratory. Shelton, Conn: International Scientific Communications, 2018.
एमएलए (8वां संस्करण) प्रशस्ति पत्रAmerican Laboratory Publishing. American Laboratory. International Scientific Communications, 2018.
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