baroro, ulfa zuaimah. “PENGEMBANGAN MODUL KIMIA MATERI SISTEM KOLOID BERBASIS PROBLEM BASED LEARNING (PBL) DI KELAS XI MIPA 4 SMA”. Hydrogen: Jurnal Kependidikan Kimia 7, no. 1 (July 4, 2019): 1–11. Accessed August 16, 2025. https://e-journal3.undikma.ac.id/index.php/hydrogen/article/view/1204.