1. Aquinas, T. (2007). Commentary on Aristotle’s politics. Hackett Publishing.
2. Aristotle. (1992). The politics. Penguin Classics.
3. Aristotle. (2012). The art of rhetoric. Collins Classics.
4. Buchanan, J. (1975). The limits of liberty: Between anarchy and leviathan. Indianapolis.
5. Buchanan, J., & Faith, R. (1987). Secession and the limits of taxation: Toward a theory of internal exit. American Economic Review, 77(5), 1023–1031.