2026. Kualitas Mikrobiologi Air Sungai Batang Toru, Sumatera Utara Berdasarkan Bakteri Indikator Pencemaran (Total Coliform, Fecal Coliform, Dan Escherichia Coli. Natura: Journal of Multidisciplinary Science. 2, 1 (Aug. 2026), 59–64. DOI:https://doi.org/10.22373/natura.005.