Woolford, Donald Mark
University of Queensland Press, 1976
Buku Teks
Robson, R.W.
Pacific Publications PTY, 1954
Buku Teks
Wilson, Lindsay
McGraw-Hill , 1975
Buku Teks
Australian Agency for International Development, 1995
Buku Teks
Epstein, A.L.
Australian Univ. Press, 1971
Buku Teks