APA
"United Nations I. E. a. S. A. (. o., "United Nations I. E. a. S. A. (. o., . (1987). Population growth and policies in mega cities. : .
Chicago
"United Nations International Economic and Social Affairs (Department of-)", "United Nations International Economic and Social Affairs (Department of-)", . 1987. Population growth and policies in mega cities. : .
Harvard
"United Nations I. E. a. S. A. (. o., "United Nations I. E. a. S. A. (. o., . (1987). Population growth and policies in mega cities. : .
MLA
"United Nations International Economic and Social Affairs (Department of-)", "United Nations International Economic and Social Affairs (Department of-)", . Population growth and policies in mega cities. : . 1987.
