Lua APA (7ú heag.)

Nettle, D. (2005). Happiness: The science behind your smile. Oxford University Press.

Lua i Stíl Chicago (17ú heag.)

Nettle, Daniel. Happiness: The Science Behind Your Smile. Oxford, UK ; New York, N.Y.: Oxford University Press, 2005.

Lua MLA (9ú heag.)

Nettle, Daniel. Happiness: The Science Behind Your Smile. Oxford University Press, 2005.

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.