1. Allen, R.G.D. 1970. Mathematical Economics. 2nd edn. New York, NY: Macmillan and St. Martin's.
2. Aquinas on Being and Essence: A Translation and Interpretation (1988). Joseph Bobik. Notre Dame, IN: University of Notre Dame Press.
3. Aristotle. 1947. Categories, trans. E. M. Edghill. New York, NY: Random House.
4. Bahn, Paul G., ed. 2009. An Enquiring Mind: Studies in Honor of Alexander Marshack. Oxford, UK: Oxford Books.
5. Boland, L.R. 1979. A critique of Friedman's critics, Journal of Economic Literature, 17 (2).