-- Dr Hahn’s Books:
Reasons to Believe,
-- Dr. Hahn Audio:
St. Joseph Communications carries an extensive list of Dr. Hahn's audio talks and more!
Visit their website by clicking here
-- Additional Resources:
Articles: Pillar and Bulwark of the Truth: The Infallible Magisterium of the Catholic Church, Scripture, Tradition and Canonicity
Books: One, Holy, Catholic and Apostolic: The Early Church Was the Catholic Churchby K. D. Whitehead, Tradition and Traditions: The Biblical, Historical and Theological Evidence for Catholic Teaching on Tradition by Yves Congar