KLAHARN, R.; CHALEOYKITTI, S. .; CHAKCHAICHON, C. . Developing an active learning model using problem-based learning to enhance the 21st century skills . Humanities and Social Sciences Letters, [S. l.], v. 13, n. 1, p. 187–199, 2025. DOI: 10.18488/73.v13i1.4046. Disponível em: https://archive.conscientiabeam.com/index.php/73/article/view/4046. Acesso em: 30 jan. 2025.