Loppies, M., Badrujaman, A. dan Sarkadi, S. 2021. The Effect of Problem Based Learning Models in Online Learning Settings on Student Cognitive Learning Outcomes in History Subjects. Journal of Education Reseach and Evaluation. 5, 1 (Jan 2021), 148–153. DOI:https://doi.org/10.23887/jere.v5i1.29654.