Educational Management of the Principals of Official Middle Level Schools in Zone 5 - Itapúa, within the framework of the Established Duties. Rev.UNIH. [Internet]. 2013 Dec. 10 [cited 2025 Oct. 21];1(01):93-104. Available from: https://revistas.uni.edu.py/index.php/unihumanitas/article/view/475