Puchta, Herbert
Cambridge University Press, 2010
Buku Teks
Puchta, Herbert
Cambridge University Press, 2012
Buku Teks
Puchta, Herbert
Cambridge University Press, 2012
Buku Teks
Hornby, Albert Sydney, author
Oxford University Press, 1984
Buku Referensi
Peter Salim, author
Modern English Press, 1991
Buku Referensi