Wakalah Contract on Delivery Services: A Comparative Study. JOURNAL OF SHARIA ECONOMICS, [S. l.], v. 3, n. 2, p. 83–98, 2021. DOI: 10.35896/jse.v3i2.234. Disponível em: https://journal.uaindonesia.ac.id/index.php/JSE/article/view/234. Acesso em: 5 may. 2026.