Murphy, R., English Grammar in use, Cambridge,
McCarthy, M. and O'Dell, F., English Vocabulary in use, Cambridge,
Hancock, M., English Pronunciation in use, Cambridge,
Comfort, J., Effective Presentations, Oxford,
Thomas, B. and Matthews, L., Vocabulary for First Certificate, Cambridge,
Bibliografía complementaria,
Hashemi, L. and Thomas, B., Grammar for First Certificate, Cambridge,
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