Mohd Asharuddin, Syazwani, et al. “Performance Assessment of Cassava Peel Starch and Alum As Dual Coagulant for Turbidity Removal in Dam Water”. International Journal of Integrated Engineering, vol. 10, no. 4, Oct. 2018, https://penerbit.uthm.edu.my/ojs/index.php/ijie/article/view/3127.