Dila Iska Ariyanti and Mashudi 2025. Implementation of the Istishna’ Contract in BTN Syariah Surabaya’s Indent IB Mortgage Financing. Al-Arfa: Journal of Sharia, Islamic Economics and Law. 3, 1 (Jul. 2025), 39–58. DOI:https://doi.org/10.61166/arfa.v3i1.80.