Anam, M. Syaiful. “Karakteristik Etika Dalam Pelarangan Riba Pada Masa Awal Islam: Ethical Characteristics in the Prohibition of Usury in the Early Period of Islam”. Fenomena 6, no. 2 (July 3, 2007): 191–208. Accessed September 23, 2025. https://fenomena.uinkhas.ac.id/fenomena/article/view/409.