Pryles, Michael
Butterworth, 1974
Buku Teks
edited by J.H.C. Morris
[Publisher not identified], 1973
Buku Teks
Humphrey, John, author
A.W. Sijthoff, 1978
Buku Teks
Martin, James A., author
Little, Brown, 1978
Buku Teks
Collier, John G. (John Greenwood), author
Cambridge University Press, 1994
Buku Teks