Parrott, Martin (2000): Grammar for English Language Teachers. Cambridge University Press

Swan, M. (1995): Practical English usage. Oxford University Press

Kesner Bland, (2003): Grammar Sense 3. Oxford university press

Alexander, L.G., (2005): Longman English grammar. Longman.

Alexander, L.G. (2005): Longman English grammar Practice. Longman.

Fernandez, R & Fraile, A. (2005): English Grammar with Exercises. Longman

Walker, E. & Elsworth, S. (2000) Grammar practice for Intermediate Students. Longman