Não informado. (1988). World development. United Nations Development Programme, Division of Information.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. World Development. New York: United Nations Development Programme, Division of Information, 1988.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. World Development. United Nations Development Programme, Division of Information, 1988.
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