World Health Organization. (1997). Post- abortion family planning a practical guide for programme managers. World Health Organization.
芝加哥风格引文World Health Organization. Post- Abortion Family Planning a Practical Guide for Programme Managers. Geneva: World Health Organization, 1997.
MLA引文World Health Organization. Post- Abortion Family Planning a Practical Guide for Programme Managers. World Health Organization, 1997.
警告：这些引文格式不一定是100％准确.