Jelaskan Catatan dari Ingibiorg Finnsdottir

Anon., Orkneyinga Saga: The History of the Earls of Orkney, tr. Hermann Pálsson and Paul Edwards. Penguin, London, 1978. ISBN 0-14-044383-5

Duncan, A.A.M., The Kingship of the Scots 842–1292: Succession and Independence. Edinburgh University Press, Edinburgh, 2002. ISBN 0-7486-1626-8

Oram, Richard, David I: The King Who Made Scotland. Tempus, Stroud, 2004. ISBN 0-7524-2825-X

Snorri Sturluson, Heimskringla: History of the Kings of Norway, tr. Lee M. Hollander. Reprinted University of Texas Press, Austin, 1992. ISBN 0-292-73061-6