Swan, Michael
The new cambridge english course 3
Cambridge University Press, 1992
 Buku Teks SO
Tilbury, Alex
English unlimited : upper intermediate
Cambridge University Press, 2011
 Multimedia
Tilbury, Alex
English unlimited : upper intermediate
Cambridge University Press, 2011
 Multimedia
Allsop, Jake
English for Cambridge first certificate: a new course
Cassell, 1981
 Buku Teks SO
Swan, Michael
The Cambridge English course
Cambridge University Press, 1987
 Buku Teks