Moh. Asep Zakariya Ansori, Yadi Janwari, and Ahmad Hasan Ridwan. “Microeconomic Theory According to Abu Ubayd And Al-Shaibani”. al-Afkar, Journal For Islamic Studies 6, no. 3 (July 4, 2023): 400–416. Accessed February 4, 2025. https://mail.al-afkar.com/index.php/Afkar_Journal/article/view/731.