Usefulbibliography General Argyle, M. (2001). The Psychology of Happiness. East Sussex: Routledge. Boniwell, I. (2006). Positive Psychology in a Nutshell. London: PWBC. Carr, A. (2004). Positive Psychology. East Sussex: Routledge. Csikszentmihalyi, M. and Csikszentmihalyi, I.S. (eds) (2006). A Life Worth Living: Contributions to positive psychology. Oxford: Oxford University Press.