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शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNarravula Priyank. Industry and Company Research - Ports and Shipping -India. Mumbai: NMIMS SBM, 2012.
एमएलए (9वां संस्करण) प्रशस्ति पत्रNarravula Priyank. Industry and Company Research - Ports and Shipping -India. NMIMS SBM, 2012.
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