Jelaskan Catatan dari Donnchadh IV

Bannerman, John, "MacDuff of Fife," in A. Grant & K.Stringer (eds.) Medieval Scotland: Crown, Lordship and Community, Essays Presented to G.W.S. Barrow, (Edinburgh, 1993), pp. 20–38

Barrow, G. W. S., Robert Bruce and the Community of the Realm of Scotland, (Edinburgh, 1988)

Broun, Dauvit, "Anglo-French Acculturation and the Irish Element in Scottish Identity", in Brendan Smith (ed.), Britain and Ireland, 9001-300: Insular Responses to Medieval European Change, (Cambridge, 1999), pp. 135–53

McDonald, Andrew, "Macduff family, earls of Fife (per. c.1095–1371)", Oxford Dictionary of National Biography, Oxford University Press, 2004 accessed 8 Sept 2007