Chambers, Andrew D., author
Pitman, 1987
Buku Teks
Charles, Curtis B.
John Wiley & Sons, 1996
Buku Teks
Sewell, Granville
Ellis Horwood , 1990
Buku Teks
Rumelhart, David E.
MIT Press, 1986
Buku Teks
Ooi, Vincent B.Y.
Edinburgh University Press, 1998
Buku Teks