Bank, W. (1991). World Development Report 1991: The challenge of development. O.U.P.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBank, World. World Development Report 1991: The Challenge of Development. O.U.P, 1991.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBank, World. World Development Report 1991: The Challenge of Development. O.U.P, 1991.
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