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D.J. MacHale (2012). “Pendragon Books 6-10: The Rivers of Zadaa; The Quillan Games; The Pilgrims of Rayne; Raven Rise; The Soldiers of Halla”, p.2451, Simon and Schuster
Pat Conroy (2016). “The Great Santini, The Lords of Discipline, and The Prince of Tides: Three Classic Novels in One Collection”, p.562, Open Road Media
Oscar Wilde, Russell Jackson, Joseph Bristow, Ian Small (2000). “The Complete Works of Oscar Wilde: The picture of Dorian Gray : the 1890 and 1891 texts”, p.14, Oxford University Press on Demand