Tamanampo, Jan W. F. S., Georis J. F. Kaligis, and lawrence J. L. Lumingas. “Cumulatif Valuation of Physic-Chemical Water Quality from Tondano Lake, North Sulawesi”. Jurnal Ilmiah PLATAX 5, no. 2 (April 17, 2017): 135–144. Accessed May 4, 2024. https://ejournal.unsrat.ac.id/v3/index.php/platax/article/view/15533.