APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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

Warning: These citations may not always be 100% accurate.