06. Sir Harold Lloyd Ridley." Britannica Book of the Year, 2002. Encyclopædia Britannica Online. Encyclopædia Britannica, 2011. Web. 09 Jun. 2011

06. Sir Harold Lloyd Ridley." Britannica Book of the Year, 2002. Encyclopædia Britannica Online. Encyclopædia Britannica, 2011. Web. 09 Jun. 2011