Clementson, Theresa
English Unlimited : intermediate
Cambridge University Press, 2011
 Multimedia
Tilbury, Alex
English unlimited : upper intermediate
Cambridge University Press, 2011
 Multimedia
Clementson, Theresa
English Unlimited : intermediate
Cambridge University Press, 2011
 Multimedia
Walters, Margan L
Intermediate dictionary of American english
N.Y.Holt,Rinehart and winston,ic, 1966
 Buku Teks
The holt intermediate dictionary of American English
Holt, Rinehart and Winston, 1966
 Buku Referensi