Cambridge University Press, 2001
eBooks
Heine, Bernd
Cambridge University Press, 2005
Buku Teks
Kaplan, Abby
Cambridge University Press, 2016
Buku Teks
Brown, Penelope
Cambridge University Press , 1987
Buku Teks
Jones, Mari C.
Routledge , 2006
Buku Teks