Westburg, Barry
Angus and Robertson Publishers, 1988.
Buku Teks
Oakley, Barry
University of Queensland Press, 1977
Buku Teks
Clarke, Marcus, author
Hale & Iremonger, c1983
Buku Teks
Jones, Barry
The M E Handbook Series, 1991
Buku Teks
Oakley, Barry
Currency Press, 1975
Buku Teks