Ferreira, M. Jamie. Doubt and Religious Commitment: The Role of the Will in Newman's Thought. Oxford. Oxford University Press. 1980. Print.
Ratzinger, Joseph Cardinal. Truth and Tolerance.: Christian Belief and World Religions. San Francisco. Ignatius Press. 2004. Print.
Newman, John Henry; Holmes; Derek, De Achaval, etc. The Theological Papers of John Henry Cardinal Newman: Volume 1: On Faith and Certainty. Oxford University Press. 1976
Mascall, Eric Lionel. Worship, its social significance and Grace and Glory and He Who Is.
Ta muchly for any responses.