Ambrose Bierce (2013). “The Best Of Ambrose Bierce: The Damned Thing + An Occurrence at Owl Creek Bridge + The Devil's Dictionary + Chickamauga (4 Classics in 1 Book)”, p.210, e-artnow
Philip Dormer Stanhope (4th earl of Chesterfield.), Charles Caleb Colton (1861). “Lord Chesterfield's advice to his son on men and manners. To which are added, selections from Colton's 'Lacon'.”, p.246
Charles Haddon Spurgeon (1988). “Spurgeon at His Best: Over 2200 Striking Quotations from the World's Most Exhaustive and Widely-read Sermon Series”, Baker Publishing Group