Reference for “SKOS Simple Knowledge Organization System Primer”

@TechReport{Summers:08:SSK,
  author      = "Ed Summers and Antoine Isaac",
  title       = "{SKOS} Simple Knowledge Organization System Primer",
  month       = feb,
  note        = "http://www.w3.org/TR/2008/WD-skos-primer-20080221/",
  year        = "2008",
  bibsource   = "http://w2.syronex.com/jmr/w3c-biblio",
  type        = "{W3C} Working Draft",
  institution = "W3C",
}