Handriani, Indah, and Soenarnatalina Melaniani. “The Effect of Referral Process and Complications to Maternal Mortality”. Jurnal Berkala Epidemiologi 3, no. 3 (September 1, 2015): 400–411. Accessed August 3, 2024. https://e-journal.unair.ac.id/JBE/article/view/1700.