Loppies M, Badrujaman A, Sarkadi S. The Effect of Problem Based Learning Models in Online Learning Settings on Student Cognitive Learning Outcomes in History Subjects. JERE [Internet]. 2021 Jan. 14 [cited 2024 Jul. 18];5(1):148-53. Available from: https://ejournal.undiksha.ac.id/index.php/JERE/article/view/29654