Basic Sources of Information: bibliographic, electronic, audiovisual, etc.

A Technique for Producing Ideas. Webb-Young, J. McGraw-Hill 2003
English Grammar In Use with Answers: A Self-study Reference and Practice Book for Intermediate Students of English (Third edition). Murphy, R. Cambridge University Press 2004
Hegarty on Advertising: Turning Intelligence into Magic. Hegarty, J. 2010
Ogilvy on Advertising. Ogilvy, D. Vintage Books 1983
Pocket Oxford Spanish Dictionary.  Oxford Dictionaries 2009 (or any bilingual Spanish-English or Catalan-English dictionary)
Professional English in Use: Marketing. Farrall, C., Lindsay, M. Cambridge University Press 2008

http://www.bbc.co.uk/learnenglish
http://www.britishcouncil.org
http://www.behindthespin.co.uk
http://www.brandrepublic.com
http://www.campaign.co.uk
http://www.lousywriter.com
http://www.prospects.ac.uk
http://prweek.co.uk
http://www.publicityinsider.com