George Bernard Shaw (2015). “George Bernard Shaw: The Collected Plays (Illustrated): 60 plays including Caesar and Cleopatra, Pygmalion, Saint Joan, The Apple Cart, Cymbeline, Androcles And The Lion, The Man Of Destiny, The Inca Of Perusalem and Macbeth Skit”, p.2024, e-artnow
Benjamin Franklin (1806). “The Complete Works, in Philosophy, Politics, and Morals, of the Late Dr. Benjamin Franklin: Now First Collected and Arranged: with Memoirs of His Early Life, Written by Himself ; in Three Volumes”, p.109