Tarigan, Indra Lasmana. “Physical, Chemical, and Biological Analysis of Drinking Water Quality in Tulungagung Regency, East Java”. Medical Laboratory Analysis and Sciences Journal 2, no. 1 (May 14, 2020): 23-30. Accessed November 24, 2024. https://melysajournal.com/index.php/Melysa/article/view/36.