Reference for “Web Content Accessibility Guidelines 2.0”

@TechReport{Cooper:08:WCA,
  author      = "Michael Cooper and Gregg Vanderheiden and Ben Caldwell and Loretta Guarino Reid",
  title       = "Web Content Accessibility Guidelines 2.0",
  month       = apr,
  note        = "http://www.w3.org/TR/2008/CR-WCAG20-20080430/",
  year        = "2008",
  bibsource   = "http://w2.syronex.com/jmr/w3c-biblio",
  type        = "Candidate Recommendation",
  institution = "W3C",
}