Khairunnisa, N. and Effendi, E. 2023. DEVELOPMENT GUIDANCE PRACTICAL OF PROBLEM BASED LEARNING CHEMISTRY GUIDE FOR COLOID MATERIALS FOR CLASS XI SMA/MA. Entalpi Pendidikan Kimia. 4, 2 (Apr. 2023), 1-7. DOI:https://doi.org/10.24036/epk.v4i2.260.