1.
335. Peningkatan Pemahaman Konsep Matematika Pada Peserta Didik Kelas 1 SD 1 Dersalam Melalui Model Pembelajaran Problem Based Learning. psnppg. 2023;1(1):2989-2996. Accessed August 12, 2026. https://conference.upgris.ac.id/index.php/psnppg/article/view/4263