- Grammar for English Language Teachers, Parrott, M., Cambridge University Press
- Practical English Usage, Swan, M., Oxford University Press
- About Language,Thornbury, S., Cambridge University Press
- Discover English, Bolitho & Tomlinson, Macmillan
- Sound Foundations, Underhill, A., Macmillan
- English Grammar in Use Higher Intermediate, Murphy, R., Cambridge University Press
- Advanced Learner’s Dictionary, Collins Cobuild, Cambridge University Press, Oxford University Press, Longman or Macmillan
- Exploring English, A Journey of Guided Discovery Through the Rules of English, Alan Marsh.
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