Cita APA (7a ed.)

(2001). Levels and trends of contraceptive use as assessed in 1998. United Nations.

Cita Chicago Style (17a ed.)

Levels and Trends of Contraceptive Use as Assessed in 1998. New York: United Nations, 2001.

Cita MLA (9a ed.)

Levels and Trends of Contraceptive Use as Assessed in 1998. United Nations, 2001.