Khairunnisa, Nadia, and Effendi Effendi. “DEVELOPMENT GUIDANCE PRACTICAL OF PROBLEM BASED LEARNING CHEMISTRY GUIDE FOR COLOID MATERIALS FOR CLASS XI SMA/MA”. Entalpi Pendidikan Kimia 4, no. 2 (April 7, 2023): 1-7. Accessed July 8, 2024. http://entalpipendidikan.ppj.unp.ac.id/index.php/epk/article/view/260.