Johnson, Colin, author
Angus & Robertson, 1987
Buku Teks
Eldershaw, M. Barnard.
Harcourt, Brace and company, 1929
Buku Teks
McDonald, Roger, author
University of Queensland Press, 1982
Buku Teks
Koea, Shonagh
Penguin Books, 1989
Buku Teks
Phillips, A. A., author
FW Chesire, 1958.
Buku Teks