Cain, Frank
Angus & Roberton Publisher, 1983
Buku Teks
Chusnul Mariyah, author
Department of Government, The University of Sydney, 1998
Buku Teks
edited by Dean Jaensch
Wakefield Press, 1986
Buku Teks
Angus & Robertson , 1955
Buku Teks
Windschuttle, Keith
Penguin Books, 1980
Buku Teks