Marta, E., & Hasrijal, H. (2018). PENGEMBANGAN BAHAN AJAR MENGGUNAKAN MODEL PROBLEM BASED LEARNING DI KELAS V SEKOLAH DASAR. JURNAL PENDIDIKAN ROKANIA, 3(3), 347-356. Retrieved from https://stkiprokania.ac.id/e-jurnal/index.php/jpr/article/view/173