Elika J. Etemad. <a href="http://www.w3.org/TR/2008/WD-css-beijing-20080516"><cite>Cascading Style Sheets (CSS) Snapshot 2007.</cite></a> 16 May 2008. W3C Working Draft. (Work in progress.) URL: <a href="http://www.w3.org/TR/2008/WD-css-beijing-20080516">http://www.w3.org/TR/2008/WD-css-beijing-20080516</a>