A Proposed Training Program to Develop the Skills of Secondary School  Principals in Aden Governorate in Light of Transformational Leadership and Self-Management. Journal of the Faculties of Education - University of Aden, [S. l.], v. 20, n. 1, 2026. Disponível em: https://journals.aden-univ.net/index.php/Jef/article/view/220. Acesso em: 8 oct. 2026.