Tamanampo, J.W.F.S., Kaligis, G.J.F. and Lumingas, lawrence J.L. 2017. Cumulatif valuation of physic-chemical water quality from Tondano Lake, North Sulawesi. Jurnal Ilmiah Platax. 5, 2 (Apr. 2017), 135–144. DOI:https://doi.org/10.35800/jip.5.2.2017.15533.