Tombokan, Sarah. “Penerapan Model Pembelajaran Problem Based Learning (PBL) Untuk Meningkatkan Hasil Belajar IPS Di SD”. Jurnal Ilmiah Wahana Pendidikan 7, no. 1 (January 31, 2021): 140-146. Accessed May 23, 2026. https://jurnal.peneliti.net/index.php/JIWP/article/view/598.