PINTONG, T.; BOONCHERD, R.; WARATCHAREEYAKUL, W. Project-Based Learning in the 21st Century: A Systematic Review of Theoretical Foundations, Design Principles, and Learning Outcomes. Journal of Education & Learning Development Innovation, [S. l.], v. 5, n. 1, p. 14–30, 2026. Disponível em: https://so15.tci-thaijo.org/index.php/JELDI/article/view/3519. Acesso em: 17 sep. 2026.