MUHTADI, A.; HUKOM, J. The effectiveness of the problem based learning (PBL) model on student self-confidence: A meta-analysis study. International Journal of Learning and Teaching, [S. l.], v. 17, n. 1, p. 1–13, 2025. DOI: 10.18844/ijlt.v17i1.9704. Disponível em: https://un-pub.eu/ojs/index.php/ijlt/article/view/9704. Acesso em: 5 dec. 2025.