Mark S. Micale, Robert L. Dietle, Peter Gay (2000). “Enlightenment, Passion, Modernity: Historical Essays in European Thought and Culture”, p.256, Stanford University Press
Peter Gay (1970). “The Bridge of Criticism; Dialogues Among Lucian, Erasmus, and Voltaire on the Enlightenment: --on History and Hope, Imagination and Reason, Constraint and Freedom--and on Its Meaning for Our Time”