Valgardson, W. D.
Oberon Press, 1978
Buku Teks
Griffith University,
Majalah, Jurnal, Buletin
Russell-Hunter, W.D.
Macmillan Publishing Co., 1979
Buku Teks
Oxford University Press, 1998
Buku Teks
Borrie, W. D., author
The Australian National University, 1954
Buku Teks