1. Ashford L: Unmet need for family planning: Recent trends and their implications for programs. Population reference Bureau. 2003
2. World population Data Sheet of the Population reference Bureau. Washington DC. 2005
3. Caldwell J, Caldwell P: Africa: The new family planning frontier. Studies in Family Planning. 2002, 33 (1): 76-86. 10.1111/j.1728-4465.2002.00076.x.
4. The transitional government of Ethiopia, Office of the Prime Minister: National population policy of Ethiopia. 1993, Addis Ababa
5. United Nations Economic and Social Council, Economic Commission for Africa (ECA): Sustainable development policy in Africa: Harmonizing population and economic growth in the process of implementing the ICPD programme of action. 2001, Addis Ababa, Ethiopia