World Health Organization Reproductive Health and Research & World health organization Family and Community Health. (2002). Selected practice recommendations for contraceptive use. Reproductive Health and Research, Family and Community Health World Health Organization.
Citace podle Chicago (17th ed.)World Health Organization Reproductive Health and Research a World health organization Family and Community Health. Selected Practice Recommendations for Contraceptive Use. Geneva: Reproductive Health and Research, Family and Community Health World Health Organization, 2002.
Citace podle MLA (8th ed.)World Health Organization Reproductive Health and Research a World health organization Family and Community Health. Selected Practice Recommendations for Contraceptive Use. Reproductive Health and Research, Family and Community Health World Health Organization, 2002.