1. Al-Suwaidi, A. (1993). Developments of the legal Systems of the Gulf Arab States. Arab Law Quarterly, 8(4), 289–301.
2. Aquinas, St Thomas Summa Theologica in Monroe. (1948). Early economic thought, selections from economic literature prior to Adam Smith (pp. 51–78). Harvard University Press.
3. Aristotle The Politics in Monroe. (1948). Early economic thought, selections from economic literature prior to Adam Smith (pp. 1–30). Harvard University Press.
4. Armstrong, K. (2000). Islam: A short history. Weidenfeld & Nicolson.
5. Bauer, P. T., & Yamey, B. S. (1957). The economics of under-developed countries. University of Chicago Press.