Adnan, Muhammad. “Improving Student Learning Outcomes Through the Application of Problem Based Learning Models on the Material of Caring for Orphans at SD Negeri 26 Leupung”. Jurnal Profesi Guru Indonesia 1, no. 4 (December 31, 2024): 232–244. Accessed June 27, 2025. https://journal.mgedukasia.or.id/index.php/jpgi/article/view/644.