Edward Gibbon (2016). “THE HISTORY OF THE DECLINE AND FALL OF THE ROMAN EMPIRE (All 6 Volumes): From the Height of the Roman Empire, the Age of Trajan and the Antonines - to the Fall of Byzantium; Including a Review of the Crusades, and the State of Rome during the Middle Ages”, p.988, e-artnow
George R. R. Martin (2012). “George R. R. Martin's A Game of Thrones 5-Book Boxed Set (Song of Ice and Fire Series): A Game of Thrones, A Clash of Kings, A Storm of Swords, A Feast for Crows, and and A Dance with Dragons”, p.756, Bantam
Edward Gibbon, Francis Parkman, William H. Prescott, Theodore Roosevelt (2012). “The Modern Library Essential World History 4-Book Bundle: The Decline and Fall of the Roman Empire (Abridged); Montcalm and Wolfe; History of the Conquest of Mexico; The Naval War of 1812”, p.237, Modern Library