Hutagalung, Doriani, Alhapsi, and Ernawati Batubara. “Implementation of Problem-Based Learning Method in Educational Learning to Improve Learning Outcomes at SD Negeri 081234 Sibolga”. Jurnal Pendidikan Profesi Guru 2, no. 2 (July 31, 2024): 57–63. Accessed February 23, 2025. https://journal.ar-raniry.ac.id/ppg/article/view/6680.