1. Aristotle, Nicomachean Ethics (Cambridge Univ. Press: Cambridge, 2000).
2. E. S. Phelps, Mass Flourishing: How Grassroots Innovation Created Jobs, Challenge, and Change (Princeton Univ. Press, Princeton, 2013).
3. V. L. Kvint, Global Emerging Market: Strategic Management and Economics (Routledge, New York, 2009).
4. European Quality of Life Survey 2012. http://www.euro-found.europa.eu/surveys/eqls/2011/index.htm?utm_source=email_press&utm-medium=email&utm_campaign=childpoverty20121018
5. World Happiness Report 2012. http://www.huffington-post.com/2012/04/06/worldhappinessreport2012-n-1408787.html