Idris C, Mesiono. The Effectiveness of Madrasah Head Leadership Competency in Increasing Educational Quality in Madrasah Tsanawiyah Private Vocational School, Al Manar Medan. BIoHS [Internet]. 2019Oct.4 [cited 2026May31];1(2):174-80. Available from: http://www.biarjournal.com/index.php/biohs/article/view/48