Marlena, B.; Yuliasni, R.; Sartamtomo; Budiarto, A.; Arum, S.; Moenir, M.; Syahroni, C. Removal of Ammonia on Catfish Processing Wastewater Using Horizontal Sub-Surface Flow Constructed Wetland (HSSFCW). j.ris.technol.pencegah. 2020, 9, 15-21.