1. Berlin, Isaiah. 1990. The crooked timber of humanity: Chapters in the history of ideas. London: John Murray.
2. Berlin, Isaiah. 1997. The proper study of mankind. London: Chatto & Windus.
3. Cherniss, Joshua, and Henry Hardy. 2022. Isaiah Berlin. Stanford encyclopedia of philosophy. https://plato.stanford.edu/entries/berlin/.
4. Crowder, George. 2002. Liberalism and value pluralism. London: Bloomsbury Publishing.
5. Declaration of the Rights of Man and of the Citizen. 1789. The Avalon project. https://avalon.law.yale.edu/18th_century/rightsof.asp.