Oswald Chambers (2015). “Biblical Ethics / The Moral Foundations of Life / The Philosophy of Sin: Ethical Principles for the Christian Life”, p.207, Discovery House
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). “Our Brilliant Heritage / If You Will Be Perfect / Disciples Indeed: The Inheritance of God's Transforming Mind & Heart”, p.359, Discovery House