Pope John Paul II (1979). “Pilgrim of Peace: The Homilies and Addresses of His Holiness Pope John Paul II on the Occasion of His Visit to the United States of America”
Oswald Chambers (2015). “Biblical Ethics / The Moral Foundations of Life / The Philosophy of Sin: Ethical Principles for the Christian Life”, p.163, Discovery House
Oswald Chambers (2015). “Biblical Ethics / The Moral Foundations of Life / The Philosophy of Sin: Ethical Principles for the Christian Life”, p.84, Discovery House