Challen, D.W
Longman Cheshire, 1979
Buku Teks
Lamberton, D.M.
Tudor Press, 1970
Buku Teks
Fairhead, J. N.
English Universities Press, 1965
Buku Teks
Boxer, A. H., author
Melbourne University Press, 1966
Buku Teks
edited by D.B. Williams with contributions by K.O. Campbell ... [and others]
Sidney University Press, 1970
Buku Teks