Yelmiza, Yelmiza, Rahma Joni, Muhamad Rokim, Hazra Yuvendius, Elvira Zondra, and Arlenny Arlenny. “The Effect of Activated Carbon From Palm Oil Kernel Shells on Waste Cooking Oil for Soap Production”. MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering 8, no. 1 (February 18, 2026): 1-12. Accessed April 29, 2026. https://www.motivection.imeirs.org/index.php/motivection/article/view/527.