M. Scott Peck (2002). “The Road Less Traveled, 25th Anniversary Edition: A New Psychology of Love, Traditional Values, and Spiritual Growth”, p.16, Simon and Schuster
Sogyal Rinpoche (2009). “The Tibetan Book of Living and Dying: The Spiritual Classic & International Bestseller: Revised and Updated Edition”, p.25, Harper Collins
Thomas Jefferson (2011). “The Papers of Thomas Jefferson, Retirement Series, Volume 7: 28 November 1813 to 30 September 1814”, p.210, Princeton University Press
Joseph Conrad (2015). “Lord Jim (Unabridged Deluxe Edition): A Classic Novel of Guilt and Atonement From the Renowned Author of Heart of Darkness, Nostromo, The Secret Agent & Under Western Eyes (Including Author’s Memoirs, Letters & Critical Essays)”, p.302, e-artnow