Mesiono, Abur Hamdi Usman and Maimun Aqsha Lubis. The Influence of Headmasters’ Perception About Their Position on the Performance of the State Junior High School Headmaster in Medan. IJAST [Internet]. 2020May3 [cited 2024May7];29(9s):874 -883. Available from: http://sersc.org/journals/index.php/IJAST/article/view/13341