Akhmad, A. G. “Removal of Total Coliform and TSS for Hospital Wastewater by Optimizing the Role of Typha Angustifolia and Fine Sand-Gravel Media in Horizontal Sub Surface Flow Constructed Wetland”. Jurnal Riset Teknologi Pencegahan Pencemaran Industri, vol. 12, no. 1, May 2021, pp. 20-31, doi:10.21771/jrtppi.2021.v12.no1.p20-31.