F. Scott Fitzgerald (2015). “The Echoes of the Jazz Age Collection: The Beautiful and Damned, Winter Dreams, The Great Gatsby, Babylon Revisited, The Diamond as Big as the Ritz and many more”, p.264, e-artnow
President Barack Obama's remarks at Barnard College Commencement Ceremony in Columbia University, New York, obamawhitehouse.archives.gov. May 14, 2012.
Mark Twain (2017). “Mark Twain, the Globetrotter: Complete Travel Books, Memoirs & Anecdotes (Illustrated Edition): A Tramp Abroad, The Innocents Abroad, Roughing It, Old Times on the Mississippi, Life on the Mississippi, Following the Equator & Some Rambling Notes of an Idle Excursion, With Author’s Biography”, p.999, e-artnow