United Nations. Department of International Economic and Social Affairs. (1981). Variations in the incidence of knowledge and use of contraception. United Nations.
Chicago Style (17th ed.) CitationUnited Nations. Department of International Economic and Social Affairs. Variations in the Incidence of Knowledge and Use of Contraception. New York: United Nations, 1981.
MLA (9th ed.) CitationUnited Nations. Department of International Economic and Social Affairs. Variations in the Incidence of Knowledge and Use of Contraception. United Nations, 1981.
Warning: These citations may not always be 100% accurate.