Sisam, Kenneth

Oxford, The Clarendon press, 1921.

London ; New York : Published for the Early English Text Society by K. Paul, Trench, Trübner & Co., and by H. Milford, Oxford University Press,

Lewis, C. S. (Clive Staples), 1898-1963

London, Oxford Univ. Press, 1953.

Hieatt, Constance B.

The Hague, Paris, Mouton & Co., 1967.

Cambridge ; New York : Cambridge University Press, 1999.