1. Alexis de Tocqueville, Democracy in America: Historical-Critical Edition of De la Démocratie en Amérique, trans. Eduardo Nolla and James T. Schleifer, Indianapolis, Liberty Fund, 2010, p. 369-372.
2. Niccolo Machiavelli, The Prince, Cambridge, Cambridge University Press.
3. A. J. P. Taylor, The Struggle for Mastery in Europe, 1848-1918, Oxford, Clarendon Press, 1954.
4. Gordon Wright, “The Imperial Experiment, 1852-1870”, Brison D. Gooch (ed.) Napoleon - Man of Destiny Enlightened Statesman or Proto-Fascist?, New York, Holt, Rinehart and Winston, 1963.