UNFPA. (2009). Adding it up: The costs and benefits of investing in family planning and maternal newborn health.
芝加哥风格引文UNFPA. Adding It Up: The Costs and Benefits of Investing in Family Planning and Maternal Newborn Health. 2009.
MLA引文UNFPA. Adding It Up: The Costs and Benefits of Investing in Family Planning and Maternal Newborn Health. 2009.
警告：这些引文格式不一定是100％准确.