Black, Michael
Objective IELTS intermediate student's book
Cambridge University Press, 2010
 Buku Teks
McCarthy, Michael
English vocabulary in use : upper-intermediate & advanced
Erlangga, 2002
 Buku Teks
Hewings, Martin
Advanced grammar in Use : a self-study reference and practice book for advanced studentss of english with answers
Cambridge University Press, 2006
 Buku Teks
Puchta, Herbert
English in mind: student book (starter)
Cambridge University Press, 2012
 Buku Teks SO
Puchta, Herbert
English in mind: student book 5
Cambridge University Press, 2012
 Buku Teks SO