KLADCHUEN, Ratchapol; SRISOMPHAN, Jiraphan. The Synthesis of a Model of Problem-Based Learning With the Gamification Concept to Enhance the Problem-Solving Skills for High Vocational Certificate. International Journal of Emerging Technologies in Learning (iJET), [S. l.], v. 16, n. 14, p. pp. 4–21, 2021. DOI: 10.3991/ijet.v16i14.20439. Disponível em: https://online-journals.org/index.php/i-jet/article/view/20439. Acesso em: 6 may. 2024.