Cita APA (7th ed.)

(2004). Levels and trends of contraceptive use as assessed in 2002.

Cita Chicago (17th ed.)

Levels and Trends of Contraceptive Use as Assessed in 2002. New York, 2004.

Cita MLA (8th ed.)

Levels and Trends of Contraceptive Use as Assessed in 2002. 2004.