United Nations. Department for Economic and Social Information and Policy Analysis. (1995). The challenge of urbanization: The world's large cities.
Chicago Style (17th ed.) CitationUnited Nations. Department for Economic and Social Information and Policy Analysis. The Challenge of Urbanization: The World's Large Cities. USA, New York, 1995.
MLA (9th ed.) CitationUnited Nations. Department for Economic and Social Information and Policy Analysis. The Challenge of Urbanization: The World's Large Cities. 1995.
Warning: These citations may not always be 100% accurate.