Shakti Gawain (2008). “Living in the Light: A Guide to Personal and Planetary Transformation: Easyread Super Large 24pt Edition”, p.49, ReadHowYouWant.com
William Shakespeare, Nick De Somogyi (2001). “Hamlet: The Tragedie of Hamlet, Prince of Denmarke : the First Folio of 1623 and a Parallel Modern Edition”, p.106, Nick Hern Books