Wiguna, E. and Utami, Y. 2018. The Analysis of Productive Waqf Development in PKU Muhammadiyah Maternal and Pediatric Hospital Kotagede. Journal of Economics Research and Social Sciences. 2, 2 (Aug. 2018), 94–101. DOI:https://doi.org/10.18196/jerss.v2i2.9084.