APA (7th ed.) Citation

Thaler Richard H. & Sunstein Cass R. (2009). Nudge: Improving Decisions About Health, Wealth, and Happiness. Penguin Books.

Chicago Style (17th ed.) Citation

Thaler Richard H. and Sunstein Cass R. Nudge: Improving Decisions About Health, Wealth, and Happiness. London , England: Penguin Books, 2009.

MLA (9th ed.) Citation

Thaler Richard H. and Sunstein Cass R. Nudge: Improving Decisions About Health, Wealth, and Happiness. Penguin Books, 2009.