Ralph Waldo Emerson, Robert Ernest Spiller, Alfred Riggs Ferguson, Wallace E. Williams, Joseph Slater (1987). “The Collected Works of Ralph Waldo Emerson: Representative men: seven lectures”, p.13, Harvard University Press
William Shakespeare, Ad Brown (1850). “Julius Caesar ... With explanatory French notes, by Ad. Brown. Improved with a copious selection of notes from Johnson, Steevens, Malone, Theobald, Warburton, etc”, p.101