Natividad, J. N., & Kabamalan, M. M. M. (2012). Responsible parenthood: Natural family planning program in the regions : 2010. Commission on Population.
芝加哥风格引文Natividad, Josefina N., 与 Maria Midea M. Kabamalan. Responsible Parenthood: Natural Family Planning Program in the Regions : 2010. Mandaluyong City: Commission on Population, 2012.
MLA引文Natividad, Josefina N., 与 Maria Midea M. Kabamalan. Responsible Parenthood: Natural Family Planning Program in the Regions : 2010. Commission on Population, 2012.
警告：这些引文格式不一定是100％准确.