Tolong jelaskan mengenai Sumber kedua dari Eadred

Gough, Harold. "Eadred's Charter of AD 949 and the Extent of the Monastic Estate of Reculver, Kent." St Dunstan: His Life, Times and Cult, ed. Nigel Ramsay and Margaret Sparks. Woodbridge and Rochester, NY: Boydell, 1992. 89-10.

Sawyer, P. “The last Scandinavian rulers of York.” Northern History 31 (1995): 39-44.

Stenton, Frank Merry. Anglo-Saxon England. 3d ed. Oxford, 1971. 360-3.