APA (7th ed.) Citation

Wilkinson, R. G., & Pickett, K. (2010). The spirit level: Why equality is better for everyone. Penguin Books.

Chicago Style (17th ed.) Citation

Wilkinson, Richard G., and Kate Pickett. The Spirit Level: Why Equality Is Better for Everyone. London: Penguin Books, 2010.

MLA (8th ed.) Citation

Wilkinson, Richard G., and Kate Pickett. The Spirit Level: Why Equality Is Better for Everyone. Penguin Books, 2010.