A. Hariz Amran, N. Syamimi Zaidi, K. Muda, and L. Wai Loan, “Effectiveness of Natural Coagulant in Coagulation Process: A Review”, IJET, vol. 7, no. 3.9, pp. 34–37, Jul. 2018, doi: 10.14419/ijet.v7i3.9.15269.