Attwood, Gaynor, author
McGraw-Hill, 1989
Buku Referensi
Gunton, Tony, author
Penguin Books, 1993
Buku Referensi
Longley, Dennis, author
Macmillan, 1982
Buku Referensi
Jones, David J., author
Australia, Second Back Row Press
Buku Referensi
Jones, David J.
Second Back Row Press, 1981
Buku Teks