THAWSOPA, S.; CHAROENKUL, N. The Priority Needs of the Primary Schools Management based on Lean Six-sigma Method. Journal of Humanities and Social Sciences, Rajapruk University, [S. l.], v. 6, n. 3, p. 149–161, 2020. Disponível em: https://so03.tci-thaijo.org/index.php/rpu/article/view/248929. Acesso em: 10 oct. 2026.