Nadeak, Bernadetha, and Lamhot Naibaho. “THE EFFECTIVENESS OF PROBLEM-BASED LEARNING ON STUDENTS’ CRITICAL THINKING”. Jurnal Dinamika Pendidikan 13, no. 1 (April 24, 2020): 1-7. Accessed April 16, 2024. http://ejournal.uki.ac.id/index.php/jdp/article/view/1393.