UTAMI, Indrianti Putri. Praktik Jual Beli Pre Order dengan Sistem Online: Practice of Pre-Order Buying and Selling with Online System. Al-Muamalat: Jurnal Ekonomi Syariah, [S. l.], v. 9, n. 1, p. 20–28, 2022. DOI: 10.15575/am.v9i1.14045. Disponível em: http://103.55.33.27/index.php/mua/article/view/14045. Acesso em: 16 jun. 2025.