Hewings, Martin
Advanced grammar in use : a reference and practice book for advanced students of english
Cambridge University Press, 2005
 Buku Teks SO
Pollock, Carroll Washington
Communicate what you mean : grammar for high level ESL students / Carroll Washington Pollock
Prentice-Hall, 1982
 Buku Teks SO
Dean, Howard H.
Effective communication : a guide to reading, writing, speaking and listening
Prentice-Hall, 1962
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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
Muhibbin Syah
Cara mudah menerapkan Engglish grammar : kaidah & pelatihan untuk rujukan belajar sendiri
RajaGrafindo Persada, 2010
 Buku Teks SO