GANIHAR, N. N. A STUDY OF QUALITY INDICATORS FROM THE PERSPECTIVE OF HEADS OF SECONDARY SCHOOLS. International Online Journal of Education and Teaching, [S. l.], v. 2, n. 1, p. 43–52, 2015. Disponível em: https://iojet.org/index.php/IOJET/article/view/74. Acesso em: 7 jan. 2026.