Gavin Nicol; et al. <a href="http://www.w3.org/TR/2004/REC-DOM-Level-3-Core-20040407"><cite>Document Object Model (DOM) Level 3 Core Specification.</cite></a> 7 April 2004. W3C Recommendation. URL: <a href="http://www.w3.org/TR/2004/REC-DOM-Level-3-Core-20040407">http://www.w3.org/TR/2004/REC-DOM-Level-3-Core-20040407</a>