Ismail, Nurliyana, Mohd Fadzil Arshad, Hamidah Mohd Saman, and Choong Wee Kang. “Water Treatment Sludge Stabilizer Binder by Waste Paper Sludge Ash for Solidification Stabilisation Technique”. International Journal of Integrated Engineering 11, no. 1 (May 5, 2019). Accessed July 23, 2024. https://penerbit.uthm.edu.my/ojs/index.php/ijie/article/view/2460.