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
Oswald Chambers (2010). “Christian Disciplines: Building Strong Christian Character through Divine Guidance, Suffering, Peril, Prayer, Loneliness, and Patience”, p.158, Discovery House
Oswald Chambers (2015). “Our Brilliant Heritage / If You Will Be Perfect / Disciples Indeed: The Inheritance of God's Transforming Mind & Heart”, p.282, Discovery House
Oswald Chambers (2015). “Our Brilliant Heritage / If You Will Be Perfect / Disciples Indeed: The Inheritance of God's Transforming Mind & Heart”, p.61, Discovery House