Tham khảo Mordred

Alcock, Leslie (1971). Arthur's Britain, p. 88. London: Penguin Press.
Bromwich, Rachel (2006). Trioedd Ynys Prydein: The Triads of the Island of Britain. University of Wales Press. ISBN 0-7083-1386-8
Lacy, Norris J. (Ed.), The New Arthurian Encyclopedia, pp. 8–9. New York: Garland. ISBN 0-8240-4377-4.
Lacy, Norris J.; Ashe, Geoffrey; and Mancroff, Debra N. (1997). The Arthurian Handbook. New York: Garland. ISBN 0-8153-2081-7.

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