Hadi, Sofwan. “Studies on the Implied Effectiveness of Online Learning Systems in IAIN Ponorogo”. Journal of Quality Assurance in Islamic Education (JQAIE) 1, no. 1 (June 25, 2021): 41–50. Accessed August 2, 2025. https://e-jurnal.iainsorong.ac.id/index.php/jqaie/article/view/392.