Dodwell, C. R. (1982) Anglo-Saxon Art, A New Perspective, Manchester UP, ISBN0-7190-0926-X. Miracle, p. 213
Wernher, Martin (1992) "The Liudhard Medalet", in Anglo-Saxon England, Volume 20, eds. Michael Lapidge, et al. Cambridge University Press ISBN0-521-41380-X, 9780521413800, google books