Australian Agency for International Development, 1995
Buku Teks
Woolford, Donald Mark, author
University of Queensland Press, 1976
Buku Teks
Nelson, Hank
Penguin Books, 1974
Buku Teks
Muller, Kal, author
DW Books, 2011
Buku Teks
van der Veur, Paul W., author
Australian National University Press, 1966
Buku Teks