Johan Hjelm; Hidetaka Ohto; Lalitha Suryanarayana. <a href="http://www.w3.org/TR/2001/WD-CCPP-trust-20011220"><cite>CC/PP Implementors Guide: Privacy and Protocols.</cite></a> 20 December 2001. W3C Working Draft. (Work in progress.) URL: <a href="http://www.w3.org/TR/2001/WD-CCPP-trust-20011220">http://www.w3.org/TR/2001/WD-CCPP-trust-20011220</a>