Harizon, Harizon, and Firdiawan Ekaputra. “Application of PjBL Model by Utilizing Natural Materials Chemistry to Improve Students’ 4C Skills”. EduLine: Journal of Education and Learning Innovation 3, no. 3 (September 26, 2023): 479–483. Accessed April 25, 2026. https://jurnal.ahmar.id/index.php/eduline/article/view/2060.