Wayne W. Dyer (2009). “A Promise Is a Promise: An Almost Unbelievable Story of a Mother's Unconditional Love and What It Can Teach Us: Easyread Large Edition”, p.1, ReadHowYouWant.com
Henry David Thoreau, Laura Ross (2009). “Walden, Or, Life in the Woods: Bold-faced Ideas for Living a Truly Transcendent Life”, p.50, Sterling Publishing Company, Inc.