Parkin, Andrew
Macmillan, 1982
Buku Teks
Aitkin, Don, author
Pitman, 1985
Buku Teks
Joske, Percy Ernest, author
Butterworth, 1967
Buku Teks
Greenwood, Gordon, 1913-1986, author
University of Queensland, 1976
Buku Teks
Chapman, R.J.K., author
George Allen and Unwin, 1984
Buku Teks