Catherine Parr The Complete Peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, Extant, Extinct or Dormant, new ed., 13 volúmenes en 14, 1910–1959; reimpreso en 6 volúmenes, Gloucester, R.U.: Alan Sutton Publishing, 2000, vol. VII, p. 483.
William Parr, 1st Marquess of Northampton The Complete Peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, Extant, Extinct or Dormant, new ed., 13 volúmenes en 14, 1910–1959; reimpreso en 6 volúmenes, Gloucester, R.U.: Alan Sutton Publishing, 2000, vol. VII, p. 670.
