United Nations. Department of International Economic and Social Affairs. (1989). Levels and trends of contraceptive use as assessed in 1988. United Nations.
Chicago Style (17th ed.) CitationUnited Nations. Department of International Economic and Social Affairs. Levels and Trends of Contraceptive Use as Assessed in 1988. New York: United Nations, 1989.
MLA (9th ed.) CitationUnited Nations. Department of International Economic and Social Affairs. Levels and Trends of Contraceptive Use as Assessed in 1988. United Nations, 1989.
Warning: These citations may not always be 100% accurate.