Markus, Andrew, author
Hale & Iremonger, 1979
Buku Teks
Yarwood, A.T., author
Methuen, 1982
Buku Teks
McConnochie, Keith
Social Science Press, 1988
Buku Teks
edited by F. S. Stevens
Australia and New Zealand Book, 1974
Buku Teks
London, H.I., author
Sydney University Press, 1970
Buku Teks