APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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

Let op: Deze citaties zijn niet altijd 100% accuraat.