APA
United Nations. Department of International Economic and Social Affairs (New York), . (1986). Population growth and policies in mega cities. New York: United Nations.
Chicago
United Nations. Department of International Economic and Social Affairs (New York), . 1986. Population growth and policies in mega cities. New York: United Nations.
Harvard
United Nations. Department of International Economic and Social Affairs (New York), . (1986). Population growth and policies in mega cities. New York: United Nations.
MLA
United Nations. Department of International Economic and Social Affairs (New York), . Population growth and policies in mega cities. New York: United Nations. 1986.