Sitorus EL, Munthe B, Bangun B. IMPLEMENTATION OF THE PROBLEM BASED LEARNING MODEL IN INCREASING STUDENT CREATIVITY IN PAK LEARNING IN CLASS XI PRIVATE HIGH SCHOOL HKBP SIDORAME MEDAN. JRPP [Internet]. 2023Sep.17 [cited 2024Jul.22];6(3):459-68. Available from: http://journal.universitaspahlawan.ac.id/index.php/jrpp/article/view/19039