George Washington, Jared Sparks (1839). “The Writings of George Washington: Being His Correspondence, Addresses, Messages, and Other Papers, Official and Private, Selected and Published from the Original Manuscripts”, p.14
Mary Wollstonecraft Shelley (1988). “Frankenstein, Or, The Modern Prometheus: With Supplementary Essays and Poems from the Twentieth Century”, p.187, Orchises Press
Neil deGrasse Tyson (2010). “The Pluto Files: The Rise and Fall of America's Favorite Planet: The Rise and Fall of America’s Favorite Planet”, p.51, W. W. Norton & Company