Ahmad A, Haryanto B. The Leadership Role of Junior High School Principals in Maintaining Institutional Sustainability in the Covid-19 Era. ijler [Internet]. 2023Feb.17 [cited 2024Jul.22];18(1):10.21070/ijler.v18i0.847. Available from: https://ijler.umsida.ac.id/index.php/ijler/article/view/847