Jusuf, Elizabet C., et al. “Maternal Death Risk Factors in Wahidin Sudirohusodo Hospital and Its Affiliates: Faktor Risiko Kematian Maternal Di Rumah Sakit Umum Pusat Wahidin Sudirohusodo Dan Jejaringnya”. Indonesian Journal of Obstetrics and Gynecology, vol. 7, no. 4, Oct. 2019, pp. 262-6, doi:10.32771/inajog.v7i4.976.