1. Adams, David M. 2013. Philosophical problems in the law, 5th ed. Independence, KY: Cengage Wadsworth.
2. Alexy, Robert. 2002. The Argument from Injustice. Trans. B.L. Paulson and S.L. Paulson. Oxford: Oxford University Press.
3. Arthur, John, and William H. Shaw. 2010. Readings in the philosophy of law, 5th ed. Upper Saddle River, NJ: Prentice Hall.
4. Barzun, Jacques. 2000. From dawn to decadence: 500 years of western cultural life, 1500 to the present. New York: HarperCollins.
5. Bix, Brian H. 2015. Rules and normativity in law. In Problems of normativity, rules and rule following, ed. Tomasz Gizbert-Studnicki, Krzysztof Płeszka, Michał Arszkiewicz, and Paweł Banas, 125–146. Dordrecht: Springer.