Hutagalung D, Alhapsi, Batubara E. Implementation of Problem-Based Learning Method in Educational Learning to Improve Learning Outcomes at SD Negeri 081234 Sibolga. jppg [Internet]. 2024 Jul. 31 [cited 2025 Feb. 23];2(2):57-63. Available from: https://journal.ar-raniry.ac.id/ppg/article/view/6680