Graver, B.D.
Advanced English practice
Oxford University Press, 1990
 Buku Teks SO
Hewings, Martin
Advanced grammar in use : a reference and practice book for advanced students of english
Cambridge University Press, 2005
 Buku Teks SO
Bradford, Barbara
Intonation in context : intonation practice for upper-intermediate and advanced learners of English
Cambridge University Press, 1988
 Buku Teks SO
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
Advanced Indonesian-english dictionary
editor, Peter Salim
Modern English Press, 1990
 Buku Referensi