1. Special Program of Research Development and Research Training in Human Reproductive Health (HRP). Progress in Reproductive Health Research. UNDO/UNFP/WHO; 2003.
2. Special program of research development and research training in human reproductive health. World Bank. UNDO, UNFPA, WHO; 2005;64:241‒312.
3. Sujay R. Premarital sexual behavior among unmarried college students. Health and Population Innovation Fellowship Program. 2005;10:15.
4. The State of World Population, UNFAP. Geneva; 2006.
5. Sexual risky behavior among Young People in Bamenda, Cameroon;Rweng;International Family Planning Perspectives,2000