1.
Ardi B, Mukhtar M, Rajagukguk W. DEVELOPMENT OF PROBLEM BASED LEARNING TOOLS TO IMPROVE MATHEMATICS PROBLEM-SOLVING ABILITY. SIJEL [Internet]. 2021Nov.8 [cited 2026Aug.17];1(4):1020-32. Available from: https://www.sijel-journal.sensei-journal.com/jbo/article/view/57