3. Grit: the power of passion and perseverance Duckworth, Angela, New York, NY : Scribner, 2016. PSY209
4. Flow and the foundations of positive psychology: the collected works of Mihaly Csikszentmihalyi Csikszentmihalyi, Mihaly. Dordrecht : Springer, c2014. PSY209
5. The Wiley-Blackwell handbook of positive psychological interventions Hoboken : Wiley Blackwell, 2014. PSY209
6. Authentic happiness: using the new positive psychology to realize your potential for lasting fulfillment Seligman, Martin E. P. New York : Atria Paperback, 2013. PSY209
8. Positivity: top-notch research reveals the 3-to-1 ratio that will change your life Fredrickson, Barbara. New York, NY : Three Rivers Press, c2009. PSY209
9. The how of happiness: a scientific approach to getting the life you want Lyubomirsky, Sonja. New York, NY : Penguin Press, 2007. PSY209
10. Character strengths and virtues: a handbook and classification Peterson, Christopher, 1950 Feb. 18- Washington, DC : American Psychological Association ; 2004. PSY209 PSY311
