M. h. t. det anglo-katolske synspunkt henvises til Hoffman Nickerson: The Inquisition: A Political and Military Study of Its Etablishment. M. h. t. det ikke-katolske synspunkt henvises til Philip van Limborch: History of the Inquisition, Henry C. Lea: History of the Inquisition in Middle Ages, 3, vols, History of the Inquisition in Spain 4 vols, og The Inquisition in Spanich Dependencies, endelig A. S. Turberville: Medieval Heresy and the Inquisition (London: C. Lockwood and Son, 1920 a mediating view).