Liswardi, Liswardi. “Wakalah Bi Al-Ujrah in Letter of Credit Services: Sharia Bank Applications”. Journal of Economicate Studies 8, no. 1 (May 20, 2024): 40–45. Accessed April 17, 2026. http://www.journal.islamicateinstitute.co.id/index.php/joes/article/view/462.