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
Hart, James D., author
Oxford University Press, 1986
Buku Referensi