Rivai, Andri, Sahmiar Pulungan, and Maryam Batubara. “A Human Resource Development Strategies in Enhancing the Welfare of As-Sunnah Deli Serdang Islamic Higher Education Institution in North Sumatra”. Indonesian Interdisciplinary Journal of Sharia Economics (IIJSE) 6, no. 3 (August 9, 2023): 1878-1893. Accessed May 24, 2026. https://e-journal.uac.ac.id/index.php/iijse/article/view/3790.