Lamya’a Ali Suliman Al -Zamki. A Proposed Training Program to Develop the Skills of Secondary School Principals in Aden Governorate in Light of Transformational Leadership and Self-Management. JEF [Internet]. 2026 Jun. 30 [cited 2026 Aug. 25];20(1):275-88. Available from: https://jef.adenuniv.net/index.php/jef/article/view/211