Annie Barrows, Mary Ann Shaffer (2011). “The Guernsey Literary and Potato Peel Pie Society (Random House Reader's Circle Deluxe Reading Group Edition): A Novel”, p.101, Dial Press
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.184