Arifin, Zainal. “The Implementation of Conventional Retailer Membership Cards In The Perspective of Islamic Business Ethics”. AL-FALAH : Journal of Islamic Economics 8, no. 1 (May 26, 2023): 49–64. Accessed November 5, 2024. https://journal.iaincurup.ac.id/index.php/alfalah/article/view/6852.