Roy,P N. (2019). International Trade: Theory and Practice (second.). New Age International Publishers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRoy,P N. International Trade: Theory and Practice. second. New Delhi: New Age International Publishers, 2019.
एमएलए (9वां संस्करण) प्रशस्ति पत्रRoy,P N. International Trade: Theory and Practice. second. New Age International Publishers, 2019.
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