Rafida, Tien. “The Determination of Effective Educational Institution at Undergraduate Program of North Sumatra State Islamic University”. Jurnal Ilmiah Peuradeun 5, no. 2 (May 27, 2017): 169–188. Accessed June 10, 2026. https://journal.scadindependent.org/index.php/jipeuradeun/article/view/131.