1. Journal:-Recent development in the economics of happiness a selective overview.
2. Role of income has been taken from sustainable scale project [from GDP and personal level of happiness report.
3. Saguaro seminar Harvard ken needy school, USA (Role of social capital).
4. SGI [A Buddhist forum for peace, culture and education].
5. A resolution from UN conference on happiness and economic development held on 23rd august 2011.
6. Journal:-Economic development and happiness; evidence from 32 nations.