McCarthy, Michael
English vocabulary in use : upper-intermediate & advanced
Erlangga, 2002
 Buku Teks
Tilbury, Alex
English unlimited : B2 upper intermediate teacher's Pack
Cambridge University Press , 2011
 Buku Teks
Klammer, Thomas
The capital budgeting process / Thomas Klammer, Jan Bell, Shahid Ansari
Irwin Mcgraw-Hill, 2000
 Buku Teks
Bradford, Barbara
Intonation in context : intonation practice for upper-intermediate and advanced learners of English
Cambridge University Press, 1988
 Buku Teks
Tilbury, Alex
English unlimited : B2 upper intermediate coursebook with e-portfolio
Cambridge University Press , 2011
 Buku Teks