Yohannes, B.Y., Utomo, S.W. dan Agustina, H. 2019. Kajian Kualitas Air Sungai dan Upaya Pengendalian Pencemaran Air. IJEEM - Indonesian Journal of Environmental Education and Management. 4, 2 (Jul 2019), 136 - 155. DOI:https://doi.org/10.21009/IJEEM.042.05.