Reference for “WAI-ARIA Primer”

@TechReport{Pappas:08:WP,
  author      = "Lisa Pappas and Michael Cooper and Richard Schwerdtfeger",
  title       = "{WAI}-ARIA Primer",
  month       = feb,
  note        = "http://www.w3.org/TR/2008/WD-wai-aria-primer-20080204/",
  year        = "2008",
  bibsource   = "http://w2.syronex.com/jmr/w3c-biblio",
  type        = "{W3C} Working Draft",
  institution = "W3C",
}