Hewings, Martin
Advanced grammar in use : a reference and practice book for advanced students of english
Cambridge University Press, 2005
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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
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Dhanny R. Cyssco
English grammar practice for TOEFL preparation test / Dhanny R. Cyssco
Puspa Swara, 2004
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Murphy, Raymond
English grammar in use : a reference and practice book for intermediate students / Raymond Murphy
Cambridge University Press, 1998
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Kaplan, Jeffrey P.
English grammar : principles and facts
Prentice Hall International, 1995
 Buku Teks SO