Felix Sasaki; Christian Lieske. <a href="http://www.w3.org/TR/2007/REC-its-20070403"><cite>Internationalization Tag Set (ITS) Version 1.0.</cite></a> 3 April 2007. W3C Recommendation. URL: <a href="http://www.w3.org/TR/2007/REC-its-20070403">http://www.w3.org/TR/2007/REC-its-20070403</a>