“Reality of Management Performance in Accordance With the Halinger Standard and Its Relation to Performance Excellence at High School Principals”. ALUSTATH JOURNAL FOR HUMAN AND SOCIAL SCIENCES 58, no. 4 (1) (November 17, 2019): 39–74. Accessed May 6, 2024. https://alustath.uobaghdad.edu.iq/index.php/UJIRCO/article/view/952.