PHUN, S. Key features of effective professional development. Cambodian Journal of Educational Research, [S. l.], v. 1, n. 1, p. 25–30, 2021. DOI: 10.62037/cjer.2021.01.01.05. Disponível em: https://cjerjournal.com/index.php/cjer/article/view/12. Acesso em: 13 nov. 2026.