Edi Faisal Harahap. “ANALYSIS OF THE EFFECTIVENESS OF IMPLEMENTING THE FOUR EYES PRINCIPLE TO CONTROL NPF IN ISLAMIC BANKS: LITERATURE REVIEW”. International Journal of Educational Review, Law And Social Sciences (IJERLAS) 5, no. 1 (January 13, 2025): 189–198. Accessed June 25, 2026. https://radjapublika.com/index.php/IJERLAS/article/view/2377.