KHALID, M.; RAHMAN, H. Problem-Based Learning to Enhance Students’ Understanding and Motivation for Learning Mechanical Science. IIUM Journal of Educational Studies, [S. l.], v. 2, n. 1, p. 56–66, 2014. DOI: 10.31436/ijes.v2i1.31. Disponível em: https://journals.iium.edu.my/ijes/index.php/iejs/article/view/31. Acesso em: 18 apr. 2024.