Conversation with Nassau William Senior on May 22, 1850 "Correspondence and Conversations of Alexis de Tocqueville with Nassau William Senior from 1834 to 1859", p. 94, 1872.
Alexis de Tocqueville, François Furet, Francoise Melonio (1998). “The Old Regime and the Revolution, Volume I: The Complete Text”, p.222, University of Chicago Press