1. Anderson, Elizabeth. 1993. Value in Ethics and Economics (Cambridge, Mass.: Harvard University Press).
2. Anderson, Elizabeth. 1997 “Practical Reason and Incommensurable Goods,” in Incommensurability, Incomparability, and Practical Reason, ed. Ruth Chang, (Cambridge, MA: Harvard University Press), pp. 90–109.
3. Andre, Judith. 1992. “Blocked Exchanges: A Taxonomy,” Ethics, vol. 103, no. 1, pp. 29–47.
4. Annis, David B. 1987. “The Meaning, Value, and Duties of Friendship,” American Philosophical Quarterly, vol. 24, no. 4, pp. 349–356
5. Aristotle. Nicomachean Ethics, trans. Michael Pakaluk (Repr. Oxford: Clarendon Press, 1998).