Simbolon, Redina, and Henny Dewi Koeswanti. “Comparison of Pbl (Project Based Learning) Models With Pbl (Problem Based Learning) Models to Determine Student Learning Outcomes and Motivation”. International Journal of Elementary Education 4, no. 4 (March 1, 2021): 519–529. Accessed December 28, 2024. https://ejournal.undiksha.ac.id/index.php/IJEE/article/view/30087.