Syaiful, Andi, Ridwan Ridwan, and Imaduddin Imaduddin. “Project-Based Learning on Making Soap from Used Cooking Oil for Muhammadiyah La’joa Middle School Students, Soppeng Regency, South Sulawesi”. Riau Journal of Empowerment 8, no. 1 (April 19, 2026): 1-11. Accessed October 28, 2026. https://raje.unri.ac.id/index.php/raje/article/view/1031.