Carter, Ronald
Cambridge Cambridge University , 1987
Buku Teks
Carter, Ronald
Longman, 1991
Buku Teks
edited by Nigel Fabb [and others]
Manchester University Press, 1987
Buku Teks
Shepherd, Valerie, author
Routledge, 1994
Buku Teks
Collie, Joanne, author
Cambridge University Press, 1990
Buku Teks