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 2026Jun.12];1(2):174-80. Available from: https://biarjournal.com/index.php/biohs/article/view/48