-COLLINS (2011). Collins COBUILD Intermediate English Grammar and Practice. Londres: Harper Collins.
-LOTT, Hester. (2008). Real English Grammar. Intermediate to Upper Intermediate. Londres: Marshall Cavendish.
-MURPHY, Raymond (2012). English Grammar in Use: A self-study reference and practice book for intermediate learners of English. Cambridge: Cambridge University Press.
-MURPHY, Raymond (2011). Essential Grammar in Use: Gramática básica de la lengua inglesa, con respuestas. Madrid, Cambridge: Cambridge University Press.
-MURPHY, Raymond (2015). Essential Grammar in Use, with answers (4ª edición). Cambridge: Cambridge University Press.
-NAYLOR, Helen y MURPHY, Raymond (2015). Essential Grammar in Use. Supplementary Exercises. Cambridge: Cambridge University Press.
-SWAN, Michael (2009). Practical English Usage. Oxford: Oxford University Press (3ª edición).
-SWAN, Michael y WALTER, Catherine (2011). Oxford English Grammar Course: Intermediate. Oxford: Oxford University Press.