M. T. Carrasco Benitez. <a href="http://www.w3.org/TR/1998/NOTE-html-lan-19980313"><cite>Primary Language in HTML.</cite></a> 13 March 1998. W3C Note. URL: <a href="http://www.w3.org/TR/1998/NOTE-html-lan-19980313">http://www.w3.org/TR/1998/NOTE-html-lan-19980313</a>