Nurhamidah R, Akbar MA. USE OF PROBLEM BASED LEARNING MODELS TO IMPROVE STUDENT LEARNING OUTCOMES AT SD NEGERI 1 BUMIRATU. EJLHSS [Internet]. 2024 Jun. 23 [cited 2025 Sep. 2];1(6):69-77. Available from: https://journal.antispublisher.id/index.php/EJLHSS/article/view/664