Irwan’, T., and P. Agamuthu Agamuthu. “A Case Study on the Treatment of Wastewater Sludge from an Electronic Plant Using Cement”. Malaysian Journal of Science 23 (December 30, 2004): 251–257. Accessed December 23, 2024. https://mjes.um.edu.my/index.php/MJS/article/view/9357.