Lamberton, D.M.
Tudor Press, 1970
Buku Teks
Challen, D.W
Longman Cheshire, 1979
Buku Teks
edited by J.P. Nieuwenhuysen and P.J. Drake
Melbourne Unversity Press, 1977
Buku Teks
Boxer, A. H., author
Melbourne University Press, 1966
Buku Teks
edited by Richard Ivan Downing
Weidenfeld and Nicolson, 1973
Buku Teks