Huges, Colin Anfield
Oxford University Press, 1976
Buku Teks
Ross, Lloyd
Macmillan, 1977
Buku Teks
Hawke, Bob
william Heinemann Australia, 1994
Buku Teks
University of Queensland, 1968
Buku Teks
editor, Cameron Hazlehurst
Australian National University Press, 1979
Buku Teks