Reference for “CSS3 module: Presentation Levels”

@TechReport{Hickson:03:CPL,
  author      = "Ian Hickson and H\aa{}kon Wium Lie",
  title       = "{CSS3} module: Presentation Levels",
  month       = aug,
  note        = "http://www.w3.org/TR/2003/WD-css3-preslev-20030813",
  year        = "2003",
  bibsource   = "http://w2.syronex.com/jmr/w3c-biblio",
  type        = "{W3C} Working Draft",
  institution = "W3C",
}