baroro, ulfa zuaimah 2019. PENGEMBANGAN MODUL KIMIA MATERI SISTEM KOLOID BERBASIS PROBLEM BASED LEARNING (PBL) DI KELAS XI MIPA 4 SMA. Hydrogen: Jurnal Kependidikan Kimia. 7, 1 (Jul. 2019), 1–11. DOI:https://doi.org/10.33394/hjkk.v7i1.1204.