World Health Organization. (2002). Selected practice recommendations for contraceptive use. World Health Organization.
Цитирование в стиле Чикаго (17-е изд.)World Health Organization. Selected Practice Recommendations for Contraceptive Use. Geneva: World Health Organization, 2002.
Цитирование MLA (9-е изд.)World Health Organization. Selected Practice Recommendations for Contraceptive Use. World Health Organization, 2002.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.