Vidur Apparao; et al. <a href="http://www.w3.org/TR/1998/REC-DOM-Level-1-19981001/"><cite>Document Object Model (DOM) Level 1.</cite></a> 1 October 1998. W3C Recommendation. URL: <a href="http://www.w3.org/TR/1998/REC-DOM-Level-1-19981001/">http://www.w3.org/TR/1998/REC-DOM-Level-1-19981001/</a>