APA
"UN E. a. S. I. a. P. A. (. o., "UN E. a. S. I. a. P. A. (. o., . (1995). Challenge of urbanization. New: York United Nations USA.
Chicago
"UN Economic and Social Information and Policy Analysis (Deptt of-)", "UN Economic and Social Information and Policy Analysis (Deptt of-)", . 1995. Challenge of urbanization. New: York United Nations USA.
Harvard
"UN E. a. S. I. a. P. A. (. o., "UN E. a. S. I. a. P. A. (. o., . (1995). Challenge of urbanization. New: York United Nations USA.
MLA
"UN Economic and Social Information and Policy Analysis (Deptt of-)", "UN Economic and Social Information and Policy Analysis (Deptt of-)", . Challenge of urbanization. New: York United Nations USA. 1995.
