The Chapel The Bishops Palace, Wells, Somerset. Arkistoitu 29.3.2016. Viitattu 20.1.2013. (englanniksi)
british-history.ac.uk
Diana E. Greenway: BishopsFasti Ecclesiae Anglicanae 1066-1300: volume 7: Bath and Wells. Institute of Historical Research. Arkistoitu 19.9.2013. Viitattu 28.5.2012. (englanniksi)
Diana E. Greenaway: List 9: Archdeacons: YorkFasti Ecclesiae Anglicanae 1066-1300: Volume 6: York. Institute of Historical Research. Viitattu 23.12.2012. (englanniksi)
Diana E. Greenway: Winchester: BishopsFasti Ecclesiae Anglicanae 1066-1300: volume 2: Monastic cathedrals (northern and southern provinces). Institute of Historical Research. Arkistoitu 14.2.2012. Viitattu 23.12.2012. (englanniksi)
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Norman J. G. Pounds: The Medieval Castle in England and Wales: A Political and Social History, s. 150. Cambridge University Press, 1993. ISBN 0521458285. Google books (viitattu 20.1.2013). (englanniksi)
oxforddnb.com
Robert BurnellOxford Dictionary of National Biography. Oxford University Press. Viitattu 28.5.2012. (englanniksi)
web.archive.org
Diana E. Greenway: BishopsFasti Ecclesiae Anglicanae 1066-1300: volume 7: Bath and Wells. Institute of Historical Research. Arkistoitu 19.9.2013. Viitattu 28.5.2012. (englanniksi)
Diana E. Greenway: Winchester: BishopsFasti Ecclesiae Anglicanae 1066-1300: volume 2: Monastic cathedrals (northern and southern provinces). Institute of Historical Research. Arkistoitu 14.2.2012. Viitattu 23.12.2012. (englanniksi)
The Chapel The Bishops Palace, Wells, Somerset. Arkistoitu 29.3.2016. Viitattu 20.1.2013. (englanniksi)