FitriyaniYani, SupriatnaNana, and SariMia Zultrianti. “Critical Thinking Skills through Problem Based Learning Model”. International Conference on Elementary Education 3, no. 1 (April 12, 2021): 268-278. Accessed July 22, 2024. http://proceedings2.upi.edu/index.php/icee/article/view/1474.