[1]
Driver, J. 2006. Ethics: the fundamentals. Blackwell Publishing.
[2]
Grube, G.M.A. and Plato 1992. The Republic. Hackett Publishing Company.
[3]
Rowe, C.J. et al. 2002. Nicomachean ethics. Oxford University Press.
[4]
Taylor, C.C.W. and Plato 2002. Protagoras. Oxford University Press.