Taher, T. “APPLICATION OF PROBLEM BASED LEARNING MODEL TO IMPROVE ACTIVITIES AND STUDENT LEARNING OUTCOMES OF CLASS XI IPA2 OF SMA NEGERI 5 TIDORE ON COLLOIDAL MATERIAL”. International Journal of Education, Information Technology, and Others, Vol. 2, no. 2, Dec. 2019, pp. 24-28, doi:10.5281/zenodo.3571474.