Jabarkan Silsilah dari Knud IV dari Denmark

The Oxford Illustrated History of the Vikings. Ed., Peter Sawyer. Oxford University Press, New York, 1997. Chapter Seven: "The Danish Empire and the End of the Viking Age" by Niels Lund. The quote is from page 181.

The Oxford Dictionary of Saints. Ed David High Farmer. Oxford University Press, 2004. See the entry on St Canute.