Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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