International Monetary Fund. Statistics Dept. Real Sector Division. (1993). A Guide to Direction of trade statistics. International Monetary Fund.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रInternational Monetary Fund. Statistics Dept. Real Sector Division. A Guide to Direction of Trade Statistics. Washington, D. C: International Monetary Fund, 1993.
एमएलए (9वां संस्करण) प्रशस्ति पत्रInternational Monetary Fund. Statistics Dept. Real Sector Division. A Guide to Direction of Trade Statistics. International Monetary Fund, 1993.
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