Jan Richards; James Allan. <a href="http://www.w3.org/TR/2009/WD-UAAG20-20090311"><cite>User Agent Accessibility Guidelines (UAAG) 2.0.</cite></a> 11 March 2009. W3C Working Draft. (Work in progress.) URL: <a href="http://www.w3.org/TR/2009/WD-UAAG20-20090311">http://www.w3.org/TR/2009/WD-UAAG20-20090311</a>