University of Newcatle, 1984
Buku Teks
Zwicky, Fay
University of Queensland Press, 1982
Buku Teks
Stewart, Douglas, author
Angus and Roberson Publishers, 1962
Buku Teks
Davis, Jack, author
Dent, 1988
Buku Teks
Higham, Charles, author
Angus & Robertson, 1970
Buku Teks