Lohrey, Amanda, compiler
Australian Government Publishing Service, 1988
Buku Referensi
Canbera: Australian Government Publishing service, 1980,
Buku Referensi
Stone, Carolyn R.
Wren Publishing, 1974
Buku Referensi
Hetherington, John Aikman, 1907-
Cheshire, 1960
Buku Teks
McGregor, Craig
Hodder and Stoughton, 1981
Buku Teks SO