APA
United Nations D. o. N. E. a. A., .World Population Trends and Policies 1981 Monitoring Report. New York: .
Chicago
United Nations Department of National Economic andSocial Affai, .World Population Trends and Policies 1981 Monitoring Report. New York: .
Harvard
United Nations D. o. N. E. a. A., .World Population Trends and Policies 1981 Monitoring Report. New York: .
MLA
United Nations Department of National Economic andSocial Affai, .New York: . .
