Australia Encorebooks, 1991
Buku Referensi
Gresham, Bill
Nusa Indah, 1993
Buku Teks
Spate, Oskar Hermann Kristian, author
Oxford University Press, 1965
Buku Teks
Hurley, Frank
Angus and Robertson, 1955
Buku Teks
Upton, Sydney
George Allen and Unwin, 1938
Buku Teks