http://www.mansioningles.com/vocabulario63.htm
http://www.bg-map.com/us-uk.html
http://www.ompersonal.com.ar/omexpress/idioma/britishVSamerican.htm
http://www.learnenglish.de/mistakes/USvsBrEnglish.html
http://www.englishclub.com/vocabulary/british-american.htm
