Hugh Prather (2000). “The Little Book of Letting Go: A Revolutionary 30-Day Program to Cleanse Your Mind, Lift Your Spirit and Replenish Your Soul”, p.7, Conari Press
R.T. Kendall (2010). “Total Forgiveness: When Everything in You Wants to Hold a Grudge, Point a Finger, and Remember the Pain—God Wants You to Lay it All Aside”, p.33, Charisma Media