Norbert Pachler edited by
Routledge, , 1999
Buku Teks
Edited by Norbert Pachler; Ana Redondo
Routledge, 2007
Buku Teks
Ur, Penny, author
Cambridge University Press, 1999
Buku Teks
Burton, Samuel Holroyd, author
Macmillan, 1995
Buku Teks
Coxon, Rosemary, author
Letts Educational, 1994
Buku Teks