Karmila, Hirma, Amilda Amilda, and Etrie Jayanti. 2020. “PERBANDINGAN HASIL BELAJAR MENGGUNAKAN MODEL PROBLEM BASED LEARNING DAN THINK PAIR SHARE PADA MATERI SISTEM KOLOID”. Orbital: Jurnal Pendidikan Kimia 4 (1): 75-87. https://doi.org/10.19109/ojpk.v4i1.5506.