Butar, A. B. (2022) “Penerapan Model Pembelajaran Problem Based Learning Untuk Meningkatkan Hasil Belajar Peserta Didik Pada Pelajaran Matematika Di SDS It Deli Insani”, Innovative: Journal Of Social Science Research, 2(2), pp. 347–355. Available at: https://j-innovative.org/index.php/Innovative/article/view/6911 (Accessed: 19 April 2026).