Pesch, Kevin Heinrich, and Raden Aswin Rahadi. “Evaluating Profitability of Red Mud Based Geopolymer Brick by Using The Cost Benefit Analysis Framework”. Ranah Research : Journal of Multidisciplinary Research and Development 7, no. 2 (December 28, 2024): 1061-1073. Accessed January 4, 2025. https://jurnal.ranahresearch.com/index.php/R2J/article/view/1291.