Suhirman, Suhirman, and Husnul Khotimah. “The Effects of Problem-Based Learning on Critical Thinking Skills and Student Science Literacy”. Lensa: Jurnal Kependidikan Fisika 8, no. 1 (June 30, 2020): 31–38. Accessed August 16, 2025. https://e-journal3.undikma.ac.id/index.php/Lensa/article/view/2794.