Ndaru choyo Gumilang, “Istisna Agreement Transactions in Online Buying and Selling Activities: Transaksi Akad Istisna’ dalam Kegiatan Jual Beli”, Al-Fatawa, vol. 1, no. 2, pp. 97–112, Nov. 2024, Accessed: Apr. 17, 2026. [Online]. Available: https://journal.syamilahpublishing.com/fatawa/article/view/261