Mohammad Abedrabbu Alkhawaldeh, and Mohamad Ahmad Saleem Khasawneh. “The Degree of Human Competencies Among Secondary School Principals”. Migration Letters 20, no. S2 (July 28, 2023): 1048–1060. Accessed December 24, 2024. https://migrationletters.com/index.php/ml/article/view/4490.