Hajriani S, Elpisah Elpisah, and Nurdin Nurdin. 2025. “The Effect of Problem-Based Learning (PBL) on Critical Thinking and Social Science Concept Mastery in SMPN 4 Makassar ”. International Journal of Social Science and Humanity 2 (1):70-85. https://doi.org/10.62951/ijss.v2i1.249.