June 2012 [2014-08-14]. (原始内容存档于2012-06-05). Collett-White, Mike. Cliff Richard turns to jazz to mark 70th birthday. Reuters. 9 March 2010 [15 February
Beatles Cover List. 27 September 2000 [2012-10-28]. (原始内容存档于2011-01-28). Collett-White, Mike. Document with clues to Beatles enigma up for sale. Yahoo News