Richard, Jack C., author
Airlangga University Press, 1995
Buku Teks
Coe, Graham
Routledge & Kegan Paul, 2005
Multimedia
Shin, Edysen, author
Kesaint Blanc, 2013
Multimedia
Puchta, Herbert
Cambridge University Press, 2010
Multimedia
Puchta, Herbert
Cambridge University Press, 2010
Multimedia