Yunita, Yunita, Dadang Juandi, Maximus Tamur, Angela Merici G Adem, and Jerito Pereira. “A Meta-Analysis of the Effects of Problem-Based Learning on students’ Creative Thinking in Mathematics”. Beta: Jurnal Tadris Matematika 13, no. 2 (November 30, 2020): 104–116. Accessed May 13, 2021. https://jurnalbeta.ac.id/index.php/betaJTM/article/view/380.