Style de citation APA (7e éd.)

Layard, P. R. G. (2005). Happiness: Lessons from a new science. Penguin Press.

Style de citation Chicago (17e éd.)

Layard, P. R. G. Happiness: Lessons from a New Science. New York: Penguin Press, 2005.

Style de citation MLA (8e éd.)

Layard, P. R. G. Happiness: Lessons from a New Science. Penguin Press, 2005.