(EN) Alexander MacBain, MacBain's Dictionary, su An Etymological Dictionary of the Gaelic Language, Gairm Publications, 1982. URL consultato il 10 ottobre 2009.
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(EN) Isaac Taylor, The Names of Nations, in Words and places, or, etymological illustrations of history, ethnology, and geography, 2ยช ed., Macmillan, 1864, p. 578. URL consultato il 10 ottobre 2009.
(EN) Hector Munro Chadwick, Cruithentuath, in Early Scotland: the Picts, the Scots & the Welsh of southern Scotland, CUP Archive, 1949, p. 171. URL consultato il 10 ottobre 2009.