Dyfyniad APA

United Nations. Department of International Economic and Social Affairs. (1982). World population trends and policies: 1981 monitoring report. United Nations.

Dyfyniad Arddull Chicago

United Nations. Department of International Economic and Social Affairs. World Population Trends and Policies: 1981 Monitoring Report. New York: United Nations, 1982.

Dyfyniad MLA

United Nations. Department of International Economic and Social Affairs. World Population Trends and Policies: 1981 Monitoring Report. United Nations, 1982.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.