“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 20, no. 1 (August 29, 2026). Accessed October 9, 2026. https://journals.aden-univ.net/index.php/Jef/article/view/220.