Harris, D.D. (Donald Dunstan)
Whitcombe Tombs PTY, 1963
Buku Teks
Wohlrabe, Raymond A.
J.B. Lippincott Co., 1956, 1956
Buku Teks
Berney, Maurice
Angus and Robertson, 1965
Buku Teks
Australia Encorebooks, 1991
Buku Referensi
Tweedie, Alan D.
Longmans, 1965
Buku Teks