1. The biographical information and historical quotes in this section come in part from the references that follow; from Wikipedia articles; and from the websites: [www.pursuit-of-happiness.org] and [https://positivepsychologyprogram.com].
2. Seligman, Martin E.P. and M. Czikszentmihalyi, Positive psychology: An introduction, American Psychologist, 55(1),5-14, 2000.
3. Myers, D.G. and E. Diener, Who is happy, Psychological Science, 6, 10-19, 1995.
4. Froh, J.J., The history of positive psychology, truth be told, The Psychologist, 16(3), 18-20, 2004
5. Angner, Erik, The evolution of eupathics: The historical roots of subjective measures of wellbeing, International Journal of Wellbeing, 1(1), 4-41, 2011.