World Health Organization. Reproductive Health and Research & ebrary, Inc. (2009). Medical eligibility criteria for contraceptive use (4th ed.). Reproductive Health and Research, World Health Organization.
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Chicago Style (17th ed.) Zitazioa
World Health Organization. Reproductive Health and Research eta Inc ebrary. Medical Eligibility Criteria for Contraceptive Use. 4th ed. Geneva: Reproductive Health and Research, World Health Organization, 2009.
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MLA (9th ed.) Zitazioa
World Health Organization. Reproductive Health and Research eta Inc ebrary. Medical Eligibility Criteria for Contraceptive Use. 4th ed. Reproductive Health and Research, World Health Organization, 2009.
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Kontuz: berrikusi erreferentzia hauek erabili aurretik.