Syaiful A, Ridwan R, Imaduddin I. Project-based learning on making soap from used cooking oil for Muhammadiyah La’joa Middle School Students, Soppeng Regency, South Sulawesi. raje [Internet]. 19Apr.2026 [cited 28Oct.2026];8(1):1-1. Available from: https://raje.unri.ac.id/index.php/raje/article/view/1031