Gaya APA

Thaler, R, H., Sunstein, C, R. (2008). Nudge: Improving Decisions About Health, Wealth, and Happiness . USA: Penguin Books.

Gaya MLA

Thaler, Richard, H.., Sunstein, Cass, R.. "Nudge: Improving Decisions About Health, Wealth, and Happiness". USA: Penguin Books, 2008. Text.