Types of the contract of istasna prevalent in Islamic banks and their Shariah ruling: Types of the contract of istasna prevalent in Islamic banks and their Shariah ruling. IRJIS [Internet]. 2022 Jun. 10 [cited 2024 Dec. 22];4(1):212-9. Available from: https://islamicjournals.com/ojs/index.php/IRJIS/article/view/199