Ralph Waldo Emerson (2010). “Essays and English Traits by Ralph Waldo Emerson: The Five Foot Shelf of Classics, Vol. V (in 51 Volumes)”, p.133, Cosimo, Inc.
Henry David Thoreau (2014). “Citizen Thoreau: Walden, Civil Disobedience, Life Without Principle, Slavery in Massachusetts, A Plea for Captain John Brown”, p.190, Graphic Arts Books
William Shakespeare (2009). “Three Early Comedies: Love's Labor's Lost, The Two Gentlemen of Verona, The Merry Wives of Windsor”, p.86, Bantam Classics
Attributed in Wash. Post, 30 Nov. 1952. The Post article is quoting an article in Quick Magazine from the summer of 1951. According to a letter by William S. Rubin in the New York Times, 5 Jan. 1969, this is "a trumpery originated in Il Libro Nero published by Giovanni Papini in 1951."