Coba jelasin Catatan dari Penda dari Mercia dong

A. Breeze, "The Battle of the Uinued and the River Went, Yorkshire", Northern History, Vol. 41, Issue 2 (September 2004), pages 377–83.

Filppula, M., Klemola, J., Paulasto, H., and Pitkanen, H., (2008) English and Celtic in Contact, Routledge.

D. J. V. Fisher, The Anglo-Saxon Age (1973), Longman, hardback, , pages 66 and 117–118.

Henry of Huntingdon, Historia Anglorum, translated by D. Greenway (1997), Oxford University Press.

N. J. Higham, The Convert Kings: Power and Religious Affiliation in Early Anglo-Saxon England (1997), pages 219, 240 and 241.

The Historia Brittonum, Chapters 60 and 65.

D. P. Kirby, The Earliest English Kings (1991), second edition (2000), Routledge, paperback, .

J. O. Prestwich, "King Æthelhere and the battle of the Winwaed," The English Historical Review, Vol. 83, No. 326 (January 1968), pages 89–95.

John Rhys, Celtic Folklore: Welsh and Manx (Oxford University Press 1901).

P. Sims-Williams, Religion and Literature [in Western England, 600–800 (Cambridge 1990).

C. Stancliffe and E. Cambridge (ed.), Oswald: Northumbrian King to European Saint (1995, reprinted 1996), Paul Watkins, paperback.

F. M. Stenton, Anglo-Saxon England (1943), third edition (1971), Oxford University Press, paperback (1989, reissued 1998), .

Tyler, Damian (2005) An Early Mercian Hegemony: Penda and Overkingship in the Seventh Century, in Midland History, Volume XXX, (ed. J. Rohrkasten). Published by the University of Birmingham.

A. W. Wade-Evans, The Saxones in the "Excidium Britanniæ", The Celtic Review, Vol. 10, No. 40 (June 1916), pp. 322–333.

Ann Williams, Kingship and Government in Pre-Conquest England (MacMillan Press 1999)

M. Ziegler, "The Politics of Exile in Early Northumbria", The Heroic Age, Issue 2, Autumn/Winter 1999.