Lofton Henderson. <a href="http://www.w3.org/TR/2005/NOTE-qa-handbook-20050906"><cite>The QA Handbook.</cite></a> 6 September 2005. W3C Note. URL: <a href="http://www.w3.org/TR/2005/NOTE-qa-handbook-20050906">http://www.w3.org/TR/2005/NOTE-qa-handbook-20050906</a>