Driver, J. (2006) Ethics: the fundamentals. Malden, Massachusetts: Blackwell Publishing. Available at: https://ebookcentral.proquest.com/lib/gla/detail.action?docID=1204064.
Grube, G.M.A. and Plato (1992) The Republic. Edited by C.D.C. Reeve. Indianapolis, Indiana: Hackett Publishing Company. Available at: https://ebookcentral.proquest.com/lib/gla/detail.action?docID=735561.
Rowe, C.J., Broadie, S., and Aristotle (2002) Nicomachean ethics. Oxford: Oxford University Press.
Taylor, C.C.W. and Plato (2002) Protagoras. Oxford: Oxford University Press.
