Purbaningrum, S. A., I. Qadrijati, R. B. Adriani, and H. Prasetya. “Multilevel Analysis on the Determinants of Antenatal Care Visit at Community Health Center in Madiun, East Java”. Journal of Maternal and Child Health, vol. 4, no. 3, May 2019, pp. 180-9, http://thejmch.com/index.php/thejmch/article/view/180.