1. Neinstein LS, Gordon MC, Katzman KD, Rosen SD, Woods RE: Adolescent Health Care: a practical guide. Edited by: Lippincott Williams and Wilkins. 2008, Philadelphia, 533-649. 5
2. Szarewski A, Guillebaud J: Contraception: A users guid. 2002, New York: Edited by Oxford University press, 3
3. WHO: Contraception: Issues in adolescent health and development. 2004, Geneva, [ http://whqlibdoc.who.int/publications/2004/9241591447_eng.pdf ]
4. Mohammed S, Hossain I, Khan ME, Rahman M, Sabastian MP: Emergency contraceptive pills. South east Asia Regional training manual. 2005, USAID, Population Council Frontiers, [ http://www.cecinfo.org/UserFiles/File/Frontiers%20Asia%20ECP_manual2.pdf ]
5. WHO and Gutmacher Institute: Facts on induced abortion world wide. 2007, [ http://www.searo.who.int/LinkFiles/Publications_Facts_on_Induced_Abortion_Worldwide.pdf ]