Uliyandari, Mellyta, Emilia Candrawati, Anna Ayu Herawati, and Nurlia Latipah. “Problem-Based Learning To Improve Concept Understanding and Critical Thinking Ability of Science Education Undergraduate Students”. IJORER : International Journal of Recent Educational Research 2, no. 1 (January 31, 2021): 65-72. Accessed March 17, 2025. https://journal.ia-education.com/index.php/ijorer/article/view/56.