1. Antarsh, L. (2004). The case for family planning. Report submitted to the UN Population Fund (UNFPA).
2. Rinehart, W., & Kols, A. (1984). Family planning programs. Population Reports, Series J no. 27, Vol. 12, p. 3.
3. Winikoff, B., & Sullivan, M. (1997). Assessing the role of family planning in reducing maternal mortality. Studies in Family Planning,
18, 128–143.
4. Berelson, B. (1972). 18–35 in place of 15–45? Population Council Annual Report 1971, pp. 19–27. New York: The Population Council.
5. Nortman, D. (1974). Parental age as a factor in pregnancy outcome and child development. Reports on Population/Family Planning, No. 16. New York: The Population Council.