| 1 | Harmer, J. (2010). How to teach English & How to teach grammar. Pearson Longman. • Parrot, M. (2001). Grammar for English language teachers. Cambridge: Cambridge University Press. |
| 2 | Ur, P. (2019). Grammar Practice Activities: A Practical Guide for Teachers (2nd ed.). Cambridge University Press. |
| 3 | Larsen-Freeman, D., & Celce-Murcia, M. (2016). The Grammar Book: Form, Meaning, and Use for English Language Teachers (3rd ed.). National Geographic Learning. |