Ross 1999, s.11–12. Ross, Charles (1999) [1981]. Richard III. Yale English Monarchs. New Haven, Connecticut; and London: Yale University Press. ISBN978-0-300-07979-1.
Ross 1999, s.12–14. Ross, Charles (1999) [1981]. Richard III. Yale English Monarchs. New Haven, Connecticut; and London: Yale University Press. ISBN978-0-300-07979-1.
Ross 1999, s.139. Ross, Charles (1999) [1981]. Richard III. Yale English Monarchs. New Haven, Connecticut; and London: Yale University Press. ISBN978-0-300-07979-1.
Wolffe 2001, s.274. Wolffe, Bertram (2001) [1981]. Henry VI. Yale English Monarchs. New Haven, Connecticut; and London: Yale University Press. ISBN978-0-300-08926-4.
Wolffe 2001, s.289. Wolffe, Bertram (2001) [1981]. Henry VI. Yale English Monarchs. New Haven, Connecticut; and London: Yale University Press. ISBN978-0-300-08926-4.
Ross 1999, s.336. Ross, Charles (1999) [1981]. Richard III. Yale English Monarchs. New Haven, Connecticut; and London: Yale University Press. ISBN978-0-300-07979-1.
Wolffe 2001, s.345. Wolffe, Bertram (2001) [1981]. Henry VI. Yale English Monarchs. New Haven, Connecticut; and London: Yale University Press. ISBN978-0-300-08926-4.
Ross 1999, s.xlvi. Ross, Charles (1999) [1981]. Richard III. Yale English Monarchs. New Haven, Connecticut; and London: Yale University Press. ISBN978-0-300-07979-1.