1. Christie, Robert C. (2022). The Harmony of Heart, Will, Mind and Imagination in John Henry Newman, Angelico Press.
2. Newman on Conscience;Conn;Newman Studies Journal,2009
3. D’Arcy, Martin C. (1931). The Nature of Belief, Longmans.
4. Ker, Ian (1997). Newman and Conversion, T & T Clark Ltd.
5. The Phenomenological Context and Transcendentalism of John Henry Newman and Edmund Husserl;Ekeh;Newman Studies Journal,2008