Feldman, F. (2010). Wath is this thing called happiness? (Primera edición.). Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Feldman, Fred. Wath Is This Thing Called Happiness? Primera edición. New York: Oxford University Press, 2010.
Lua MLA (8ú heag.)Feldman, Fred. Wath Is This Thing Called Happiness? Primera edición. Oxford University Press, 2010.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.