Hazboun GN. The Role of Training Courses in Improving the Professional Performance of Principals in Private Schools in Bethlehem Governorate from their point of view. JEPS [Internet]. 2024 Apr. 29 [cited 2025 Dec. 20];8(4):1-15. Available from: https://www.ajsrp.ojsexpert.com/index.php/jeps/article/view/7470