Bartlett, Robert C. (2000): . Oxford, UK: Clarendon Press. ISBN 0-19-822741-8. Barlow, Frank (1988): (4. utg.). New York: Longman. ISBN 0-582-49504-0. Gillingham, John (1999): . New Haven, CT: Yale University Press. ISBN 0-300-07912-5. Poole, Austin Lane (1955): (2. utg.). Oxford, UK: Clarendon Press. ISBN 0-19-821707-2. Turner, Ralph V. (2007): «Longchamp, William de (d. 1197)», , Oxford University Press. doi:10.1093/ref:odnb/16980. Sharpe, Richard (2004): «Richard Barre's Compedium Veteris et Noui Testamenti», . : 128–146. doi:10.1484/J.JML.2.304218. S2CID 162410647.