APA
"United Nations I. E. a. S. A. (. o., "United Nations I. E. a. S. A. (. o., . (1989). Population growth and policies in Mega-cities. New: York UN.
Chicago
"United Nations International Economics and Social Affairs (Deptt of-)", "United Nations International Economics and Social Affairs (Deptt of-)", . 1989. Population growth and policies in Mega-cities. New: York UN.
Harvard
"United Nations I. E. a. S. A. (. o., "United Nations I. E. a. S. A. (. o., . (1989). Population growth and policies in Mega-cities. New: York UN.
MLA
"United Nations International Economics and Social Affairs (Deptt of-)", "United Nations International Economics and Social Affairs (Deptt of-)", . Population growth and policies in Mega-cities. New: York UN. 1989.
