Fatih Siraj, Pani Akhiruddin Siregar, and Ahmad Afandi Surbakti. “Implementation of Sharia Investment in Islamic Banking: Analysis of Principles, Contracts, and Challenges in Strengthening the Islamic Financial System”. Al Urwah : Sharia Economics Journal 3, no. 2 (September 30, 2025): 42–47. Accessed January 15, 2026. https://journal.takaza.id/index.php/alurwah/article/view/383.