World Bank. (1981). World development report 1981. Published for the World Bank, Oxford University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWorld Bank. World Development Report 1981. New York ; Oxford: Published for the World Bank, Oxford University Press, 1981.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWorld Bank. World Development Report 1981. Published for the World Bank, Oxford University Press, 1981.
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