United Nations. Levels and trends of contraceptive use as assessed in 2002.
Cita Chicago (17th ed.)United Nations. Levels and Trends of Contraceptive Use as Assessed in 2002.
Cita MLA (8th ed.)United Nations. Levels and Trends of Contraceptive Use as Assessed in 2002.
Atenció: Aquestes cites poden no estar 100% correctes.