Reference for “WAI-ARIA User Agent Implementation Guide 1.0”

@TechReport{Cooper:09:WUA,
  author      = "Michael Cooper and Andi Snow-Weaver",
  title       = "{WAI}-ARIA User Agent Implementation Guide 1.0",
  month       = dec,
  note        = "http://www.w3.org/TR/2009/WD-wai-aria-implementation-20091215/",
  year        = "2009",
  bibsource   = "http://w2.syronex.com/jmr/w3c-biblio",
  type        = "{W3C} Working Draft",
  institution = "W3C",
}