Mark Twain, John Sutton Tuckey (1980). “The Devil's Race-track: Mark Twain's Great Dark Writings : the Best from Which was the Dream? and Fables of Man”, p.337, Univ of California Press
Jack Canfield, Mark Victor Hansen (2012). “A 2nd Helping of Chicken Soup for the Soul: More Stories to Open the Heart and Rekindle the Spirit”, p.63, Simon and Schuster