Wikipedia
http://en.wikipedia.org/wiki/Value_added_tax
HM Revenue & Customs / UK
http://www.hmrc.gov.uk/vat/start/introduction.htm
CBS News
http://www.cbsnews.com/8301-503983_162-20001918-503983.html
video: http://www.youtube.com/watch?v=FzFZfoyQD0s
European Commission Taxation and Customs Union
http://ec.europa.eu/taxation_customs/taxation/vat/how_vat_works/index_en.htm
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