SUPROM, S. The Development of Focus to Improve the Quality of Education for Secondary Schools under the Secondary Educational Service Area Office 28. Ubon Ratchathani Journal of Research and Evaluation, [S. l.], v. 9, n. 2, p. 96–107, 2020. Disponível em: https://so06.tci-thaijo.org/index.php/ubonreseva/article/view/227410. Acesso em: 20 may. 2024.