Susilawati, Munawarah U, Harahap M. Application of Problem Based Learning Model to Improve Student Learning Outcomes at SD Negeri 04 Perlabian Plantation . jppg [Internet]. 2024 Jul. 31 [cited 2025 Sep. 12];2(2):142-9. Available from: https://journal.ar-raniry.ac.id/index.php/ppg/article/view/6765