Iqbal, W., M. Hasan Basri, and L. Budiwibowo. “Household Expenditure for Java in Health Costs Compared to The Island Java”. Jurnal Kesehatan Masyarakat Andalas, vol. 11, no. 1, Sept. 2017, pp. 19-25, doi:10.24893/jkma.v11i1.210.