Educational Management of the Principals of Official Middle Level Schools in Zone 5 - Itapúa, within the framework of the Established Duties. UNIHumanitas, [S. l.], v. 1, n. 01, p. 93–104, 2013. Disponível em: https://revistas.uni.edu.py/index.php/unihumanitas/article/view/475. Acesso em: 21 oct. 2025.