Al-Harby, Seetah Ali. “Effectiveness of The Educational Leadership Program in Developing Professional and Leadership Competencies of Secondary School Principals In Wadi Al-Seer District, Jordan”. Journal of Educational and Psychological Sciences, vol. 4, no. 16, Apr. 2020, pp. 21-1, https://doi.org/10.26389/AJSRP.D191219.