APA (7th ed.) Zitazioa

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

Chicago Style (17th ed.) Zitazioa

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

MLA (9th ed.) Zitazioa

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