Orman, Sabri. “Sources of the History of Islamic Economic Thought II”. Al-Shajarah Journal of the International Institute of Islamic Thought and Civilisation (ISTAC) 3, no. 2 (November 18, 2014). Accessed March 16, 2026. https://journals.iium.edu.my/shajarah/index.php/shaj/article/view/159.