Bolong, N., I. Saad, and S. E. Arshad. “Effect of Sodium Hydroxide and Mould Shape in Geopolymer Fabrication Made With Synthesised Local Clay for Water Filtration”. Journal of Applied Membrane Science & Technology 18, no. 1 (November 13, 2017). Accessed September 27, 2021. https://amst.utm.my/index.php/amst/article/view/16.