Cita APA (7a ed.)

Layard, R. (2003). Happiness, has social science a clue? Centre for Economic Performance.

Cita Chicago Style (17a ed.)

Layard, Richard. Happiness, Has Social Science a Clue? London: Centre for Economic Performance, 2003.

Cita MLA (9a ed.)

Layard, Richard. Happiness, Has Social Science a Clue? Centre for Economic Performance, 2003.