edited by Philip Ward
Clarendon Press, 1978
Buku Referensi
general editor, William Toye
Oxford University Press, 1983
Buku Referensi
Kamien, Roger, author
MCGraw-Hill , 2000
Multimedia
Kennedy, Michael, author
Oxford University Press, 1996
Buku Referensi
by Peter Dennis, Jeffrey Grey, Ewan Morris, Robin Prior
Oxford University Press, 1995
Buku Referensi