80
Hackston, J and Moyle, P (2013) Stress doesn't have to be distressing: understanding stress and building resilience
81
McGee, P (2011) S.U.M.O. The Straight-talking Guide to Succeeding in Life
82
Pink, D (2011) Drive: the surprising truth about what motivates us
83
Kleitman, N, ‘Basic rest-activity cycle—22 years later', Journal of Sleep Research & Sleep Medicine, Vol 5(4), Dec 1982, pp 311–17
84
Schwartz, T and McCarthy, C, ‘Manage your Energy not your Time', Harvard Business Review, October 2007
85
Friedman, L F and Loria, K (2016) ‘11 Scientific Reasons you should be spending more time outside', Business Insider UK
