Ernst, F (1971) The OK Corral: the grid for get-on-with in Transactional Analysis Journal
76
Pink, D (2009) Drive: The surprising truth about what motivates us
77
Neenan, M and Dryden, W (2002) Life Coaching: A Cognitive Behavioural Approach
78
Peston, Robert, BBC's Economics editor writing in 2013 in The Telegraph about his wife's death from cancer
79
Yerkes, R M, Dodson, J D (1908). ‘The relation of strength of stimulus to rapidity of habit-formation'. Journal of Comparative Neurology and Psychology.
