MUHAMMAD ZAFAR IQBAL, KHIZAR HAYAT, JAHAN ARA SHAMS. An Investigation of School Leadership Effectiveness at Secondary Level in District Sargodha. JELM, [S. l.], v. 1, n. 1, 2023. Disponível em: https://ojs.aiou.edu.pk/index.php/jelm/article/view/307. Acesso em: 3 jul. 2024.