Tolong jelaskan mengenai Catatan dari Cynethryth

Keynes, Simon, "Cynethryth" in M. Lapidge et al. (eds), The Blackwell Encyclopedia of Anglo-Saxon England. Blackwell, London, 1999. ISBN 0-631-22492-0

Stafford, Pauline, "Political Women in Mercia, Eighth to Early Tenth Centuries" in Michelle P. Brown & Carol A. Farr (eds), Mercia, an Anglo-Saxon kingdom in Europe. Leicester: Leicester University Press, 2001. ISBN 0-8264-7765-8

Thacker, Alan, "Kings, Saints and Monasteries in pre-Viking Mercia" in Midland History, volume 10 (1985). ISSN 0047-729X

Williams, Gareth, "Mercian Coinage and Authority" in Michelle P. Brown & Carol A. Farr (eds), Mercia, an Anglo-Saxon kingdom in Europe. Leicester: Leicester University Press, 2001. ISBN 0-8264-7765-8

Yorke, Barbara, "The Origins of Mercia" in Michelle P. Brown & Carol A. Farr (eds), Mercia, an Anglo-Saxon kingdom in Europe. Leicester: Leicester University Press, 2001. ISBN 0-8264-7765-8