Frey, B. S., & Stutzer, A. (2002). Happiness and economics: How the economy and institutions affect well-being. Princeton University Press.
Lua i Stíl Chicago (17ú heag.)Frey, Bruno S., agus Alois Stutzer. Happiness and Economics: How the Economy and Institutions Affect Well-being. Princeton, N.J.: Princeton University Press, 2002.
Lua MLA (9ú heag.)Frey, Bruno S., agus Alois Stutzer. Happiness and Economics: How the Economy and Institutions Affect Well-being. Princeton University Press, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.