Zainol Abidin, Nurul Aini. “Activated Carbon-Limestone-Alginate Beads for the Simultaneous Removal of Color and Turbidity of Kerian River”. International Journal of Integrated Engineering, vol. 11, no. 2, May 2019, https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/4118.