APEBENDE, E. U.; USHIE, S. C. Teachers’ perception of their head teachers’ role effectiveness. Global Journal of Educational Research, [S. l.], v. 17, n. 1, p. 47–53, 2018. DOI: 10.4314/gjedr.v17i1.7. Disponível em: https://www.ajol.info/index.php/gjedr/article/view/170828. Acesso em: 25 sep. 2026.