1. Aristotle. (1985) Nicomachean Ethics. Indianapolis, IN: Hackett Publishing Company.
2. Bacon, F. (1862) Essays. Cambridge, UK: Cambridge University Press.
3. Berenskoetter, F. (2007) Friends, there are no friends? An intimate reframing of the international. Journal of International Studies 35 (3): 647–676.
4. Blosser, P. and Bradley, M.C. (1997) Of Friendship: Philosophic Selections on a Perennial Concern. New York, NY: University Press of America.
5. Boys-Stones, G. (1998) Eros in government: Zeno and the virtuous city. The Classical Quarterly 48 (1): 168–174.