Rahmawati, P., S. Martini, and C. U. Wahjuni. “Analysis Determinants of Postpartum Maternal Mortality at Sidoarjo Regency in 2012”. Jurnal Berkala Epidemiologi, vol. 2, no. 1, Jan. 2014, pp. 105-17, doi:10.20473/jbe.V2I12014.105-117.