Sriyono, Edy. “Survey Dan Inventarisasi Potensi Sumber Daya Air Baku Di Wilayah Sungai Progo Opak Serang”. ReTII (October 27, 2020): 26–33. Accessed April 4, 2025. https://journal.itny.ac.id/index.php/ReTII/article/view/2025.