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शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMechanical Engineer's Reference Book. 12th ed. London: Butterworth Heinemann, 1994.
एमएलए (9वां संस्करण) प्रशस्ति पत्रMechanical Engineer's Reference Book. 12th ed. Butterworth Heinemann, 1994.
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