Bryson, John
Penguin Books, 1982
Buku Teks SO
McQueen, James, 1934-1998
University of Queensland, 1981
Buku Teks SO
Dutton, Geoffrey
Macmillan, 1980
Buku Teks SO
Bosi, Pino
Hodja Educ, 1983
Buku Teks SO
Hardy, Frank
Angus and Roberson Publishers, 1965
Buku Teks SO