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Davis, P., M. (2005). Dreams and Visions in the Anglo-Saxon Conversion to Christianity. Dreaming. 15(2)75-88. doi: 10.1037/1053-0797.15.2.75

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huttleworth, M. (2010). Aristotle’s Psychology – History of Psychology. Retrieved                    December 7, 2011 from Experiment Resources.                                      http://www.experiment-resources.com/aristotles-psychology.html