Karepesina, Nur Gaib, and Julita B. Manuhutu. “Application of Problem-Based Learning (PBL) on Hydrocarbon Compound Lesson to Increase Student Learning Outcomes”. Hydrogen: Jurnal Kependidikan Kimia 11, no. 1 (February 15, 2023): 51–59. Accessed August 16, 2025. https://e-journal3.undikma.ac.id/index.php/hydrogen/article/view/6961.