PRINCIPALS ETHICAL LEADERSHIP BEHAVIOUR ON ADMINISTRATION OF PRIVATE SECONDARY SCHOOLS FOR SUSTAINABLE NATIONAL DEVELOPMENT. Scientific Journal of Educational Management, Research and law, [S. l.], v. 5, n. 1, p. 307–316, 2026. Disponível em: https://journals.aemapp.org/index.php/SJEMRL/article/view/358. Acesso em: 7 jul. 2026.