Reference for “SKOS Simple Knowledge Organization System Reference”

@TechReport{Bechhofer:09:SSK,
  author      = "Sean Bechhofer and Alistair Miles",
  title       = "{SKOS} Simple Knowledge Organization System Reference",
  month       = aug,
  note        = "http://www.w3.org/TR/2009/REC-skos-reference-20090818/",
  year        = "2009",
  bibsource   = "http://w2.syronex.com/jmr/w3c-biblio",
  type        = "{W3C} Recommendation",
  institution = "W3C",
}