Diccionarios monolingües:
The Concise Oxford Dictionary. Oxford: Oxford University Press, 1999.
Oxford Advanced Learner's Dictionary. Oxford: Oxford University Press, 1998.
Cambridge International Dictionary of English. Cambridge: Cambridge University Press.
Language Activator: Longman.
Gramáticas:
Oxford Practice Grammar. J. Eastwood & R. Mackin. Oxford: Oxford University Press.
A Practical English Grammar. A.J. Thomson & A.V. Martinet.
English Grammar in Use. R. Murphy. Cambridge: Cambridge University Press.
Co-Build English Guides. Collins, 1996.
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