United Nations. Department of International Economic and Social Affairs. (1991). World urbanization prospects 1990: Estimates and projections of urban and rural populations and of urban agglomerations. United Nations.
Chicago Style (17th ed.) CitationUnited Nations. Department of International Economic and Social Affairs. World Urbanization Prospects 1990: Estimates and Projections of Urban and Rural Populations and of Urban Agglomerations. New York: United Nations, 1991.
MLA (9th ed.) CitationUnited Nations. Department of International Economic and Social Affairs. World Urbanization Prospects 1990: Estimates and Projections of Urban and Rural Populations and of Urban Agglomerations. United Nations, 1991.
Warning: These citations may not always be 100% accurate.