International Monetary Fund. Statistics Dept. (1987). Direction of Trade Statistics Yearbook, 1987 Edition. International Monetary Fund.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रInternational Monetary Fund. Statistics Dept. Direction of Trade Statistics Yearbook, 1987 Edition. Washington, D.C.: International Monetary Fund, 1987.
एमएलए (8वां संस्करण) प्रशस्ति पत्रInternational Monetary Fund. Statistics Dept. Direction of Trade Statistics Yearbook, 1987 Edition. International Monetary Fund, 1987.
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