Nurhamidah, Ririn, and Muhamad Ali Akbar. “USE OF PROBLEM BASED LEARNING MODELS TO IMPROVE STUDENT LEARNING OUTCOMES AT SD NEGERI 1 BUMIRATU”. Journal of Learning on History and Social Sciences 1, no. 6 (June 23, 2024): 69–77. Accessed September 2, 2025. https://journal.antispublisher.id/index.php/EJLHSS/article/view/664.