John Ortberg (2010). “God Is Closer Than You Think: This Can Be the Greatest Moment of Your Life Because This Moment Is the Place Where You Can Meet God”, p.7, ReadHowYouWant.com
John Ortberg (2013). “The Life You've Always Wanted Participant's Guide: Six Sessions on Spiritual Disciplines for Ordinary People”, p.122, Harper Collins
John Ortberg, Stephen Sorenson, Amanda Sorenson (2003). “If You Want to Walk on Water, You've Got to Get Out of the Boat: A 6-session Journey on Learning to Trust God”, p.195, Zondervan