Collier, John Greenwood, author
Cambridge University Pers, 1994
Buku Teks
Mayss, Abla J., author
Cavendish, 1994
Buku Teks
Rutter, William A., author
s.n., 1973
Buku Teks
edited by J.H.C. Morris
[Publisher not identified], 1973
Buku Teks
Walton, Richard E., author
Addison-Wesley, 1987
Buku Teks