Baker, Colin, author
Multilingual Matters Ltd., 1995
Buku Referensi
Baker, Colin, author
Multilingual Matters Ltd, 1995
Buku Teks
Venkatsan, S., author
Sage, 2004
Buku Teks
Howlin, Patricia, author
John Wiley & Sons, 1999
Buku Referensi
edited by John P. Holdren, Eric Donald Hirsch
Delta Pub., 1996
Buku Teks