BC	Craven, Miles. Real Listening and Speaking Level 4 with Answers / Miles Craven. Cambridge: Cambridge University Press, 2008 [Cambridge English skills]
BC	Harrison, Mark. Word Perfect : vocabulary for fluency / Mark Harrison . - 1st. publ. Walton-on-Thames [etc.] : Nelson, 1990
BC	Powell, Debra. Common mistakes at CAE and how to avoid them / Debra Powell . - 1st published, 5th printing Cambridge : Cambridge University, 2008
BC	Swan, Michael. Practical English usage / Michael Swan . - [1st ed.], 16th imp. Oxford : Oxford University Press, 1988
BC	Thomas, B. J.. Advanced vocabulary & idiom / B.J. Thomas . - New. ed., 14th imp. Essex : Longmam, 2007
BC	Watcyn-Jones, Peter. Target Vocabulary 3 / Peter Watcyn-Jones. London: Penguin Books, 1995
BC	Wellman, Guy. The Heinemann English Wordbuilder. Vocabulary development and practice for higher-leven students / Guy Wellman. Oxford: Heinemann, 1989

LISTADO DE URLs:
	English with Jennifer. A site for language learners. [http://www.englishwithjennifer.com/]
	Learn English with SOZO Exchange [http://sozoexchange.com/]
	TED Talks [https://www.ted.com/about/programs-initiatives/ted-talks]