1. Aristotle. 1926. Nicomachean ethics. Loeb Library. (Trans: H. Rackham). Cambridge, MA: Harvard University Press.
2. Audi, Robert. 1999. Intuitionism, pluralism, and the foundations of ethics. In Moral knowledge?, ed. W. Sinnott-Armstrong, and M. Timmons. 101–137. Oxford: Oxford University Press.
3. Audi, Robert. 2004. The good in the right. Princeton, NJ: Princeton University Press.
4. Clapham, Andrew. 2015. Human rights. Oxford: Oxford University Press.
5. Crick, Bernard. 2002. Democracy. A very short introduction. Oxford: Oxford University Press.