Wilkes, G. A. (Gerald Alfred), 1927-, author
Fortana/Collins, 1980
Buku Referensi
Oxford University press , 1994
Buku Teks
Jones, David J., author
Australia, Second Back Row Press
Buku Referensi
editor, Bud Wileman, Robin Wileman, Bessana C. Sewell
Wileman Publications, 1986
Buku Referensi
Jones, David J.
Second Back Row Press, 1981
Buku Teks