Cita APA (7a ed.)

Wren-Lewis, S. (2019). The happiness problem: Expecting better in an uncertain world. Policy Press.

Cita Chicago Style (17a ed.)

Wren-Lewis, Sam. The Happiness Problem: Expecting Better in an Uncertain World. Bristol, UK ; Chicago, IL: Policy Press, 2019.

Cita MLA (8a ed.)

Wren-Lewis, Sam. The Happiness Problem: Expecting Better in an Uncertain World. Policy Press, 2019.