Tanjung, W. W. “Factors Causing The Use Of Intrauterine Device (IUD) Contraceptives In Couples Of Childbearing Age”. Science Midwifery, Vol. 10, no. 1, October, Oct. 2021, pp. 238-41, https://midwifery.iocspublisher.org/index.php/midwifery/article/view/178.