·미국 Minnesota Psychtests 부원장 ·루터란교회 협동 목사 저자 공저 ·Telling Yourself the Truth(Bethany House, 2014) ·Finding Freedom from Anxiety and Worry(Revell, 2013) ·What Your Counselor Never Told You(Bethany House, 2000) ·The Good News about Worry(Bethany House, 2000) 외 다수