Mardhiyantinengsih. APPLICATION OF THE PROBLEM-BASED LEARNING MODEL TO IMPROVE EFFECTIVE AND EFFICIENT LEARNING MODELS. JBKP [Internet]. 2022 Mar. 31 [cited 2025 Dec. 8];2(1):16-22. Available from: https://e-journal.upr.ac.id/index.php/pdhp/article/view/4309