Sudarmin, S., C. Kurniawan, P. N, M. ., A. ., and N. I. “The Implementation of Chemical Project Learning Model Integrated With Ethno-Stem Approach on Water Treatment Topic Using Kelor (Moringa Oleifera) Seed Extract As Bio-Coagulant ”. KnE Social Sciences, Vol. 3, no. 18, July 2019, pp. 492–501, doi:10.18502/kss.v3i18.4740.