1. Murray, Henry A. (1938). Analysis of the personality of Adolf Hitler (Oxford Press).
2. Hobbes, Thomas (1651). Leviathan, or the matter, forme, and power of a commonwealth, ecclesiasticall and civil.
3. Rousseau, Jean-Jacques (1782). Confessions of Jean-Jacques Rousseau.
4. Rousseau, Jean-Jacques (1762). The social contract, or principles of political right.
5. Rousseau, Jean-Jacques (1754). Discourse on the origin and basis of inequality among men.