edited by Grahame Johnston
Oxford University Press, 1980
Buku Referensi
Golovinsky, M., author
David Mckay, [date of publication not identified]
Buku Referensi
edited by George W. Turner
Melbourne, Oxford University Press, 1987
Buku Referensi
Hornby, Albert Sydney, author
Oxford University Press, 1977
Buku Referensi
New York Oxford University Press 1998,
Buku Referensi