World Health Organization. (2003). Safe abortion: Technical and policy guidance for health systems. World Health Organization.
芝加哥风格引文World Health Organization. Safe Abortion: Technical and Policy Guidance for Health Systems. Geneva: World Health Organization, 2003.
MLA引文World Health Organization. Safe Abortion: Technical and Policy Guidance for Health Systems. World Health Organization, 2003.
警告：这些引文格式不一定是100％准确.