Administrative Competency Needs of Principals for Effective UBE Administration at JSS Level in North West Geo – Political Zone of Nigeria. Journal of Educational and Social Research, London, U.K., v. 1, n. 3, p. 95, 2011. Disponível em: https://www.richtmann.org/journal/index.php/jesr/article/view/11734.. Acesso em: 5 may. 2024.