Basuki, Bastaman. “Gynecological History, Contraceptive Use and the Risk of Ectopic Pregnancy: An Indonesian Case-Control Study”. Medical Journal of Indonesia 9, no. 1 (January 1, 2000): 49-57. Accessed April 24, 2024. http://mji.ui.ac.id/journal/index.php/mji/article/view/646.