World Health Organization. (2010). Medical eligibility criteria for contraceptive use. World Health Organization.
芝加哥风格引文World Health Organization. Medical Eligibility Criteria for Contraceptive Use. Geneva, Switzerland: World Health Organization, 2010.
MLA引文World Health Organization. Medical Eligibility Criteria for Contraceptive Use. World Health Organization, 2010.
警告：这些引文格式不一定是100％准确.