Rippon, Stephen, Essex c. 760 – 1066 (页面存档备份,存于互联网档案馆) (in Bedwin, O, The Archaeology of Essex: Proceedings of the Writtle Conference (Essex County Council, 1996)
Stenton, Frank Merry; Stenton, Professor of History Frank M.; Stenton, Sir Frank Merry. Anglo-Saxon England. Clarendon Press. : 109 [2022-08-24]. ISBN 978-0-19-821716-9. (原始内容存档于2022-08-24) (英语).
Rippon, Stephen, Essex c. 760 – 1066 (页面存档备份,存于互联网档案馆) (in Bedwin, O, The Archaeology of Essex: Proceedings of the Writtle Conference (Essex County Council, 1996)
Stenton, Frank Merry; Stenton, Professor of History Frank M.; Stenton, Sir Frank Merry. Anglo-Saxon England. Clarendon Press. : 109 [2022-08-24]. ISBN 978-0-19-821716-9. (原始内容存档于2022-08-24) (英语).