Euan Cameron, ‘The Power of the Word: Renaissance and Reformation’, in Cameron, Early Modern Europe, pp. 87–90

Richard Marius, Martin Luther: The Christian between God and Death (Cambridge, Mass., and London, 1999), pp. 73–74, 214–15, 486–87

Joshua Mitchell, Not By Reason Alone: History and Identity in Early Modern Political Thought (Chicago, 1993), pp. 23–30

Martin Luther, ‘Temporal Authority: To What Extent It Should Be Obeyed’, trans. J. J. Schindel, revised by Walther I. Brandt in J. M. Porter, ed., Luther: Selected Political Writings (SPW) (Eugene, Oreg., 2003), p. 54