Gaya APA

Nudge : Improving Decisions About Health, Wealth and Happiness. (2008). USA: Penguin books.

Gaya Chicago

Nudge : Improving Decisions About Health, Wealth and Happiness. ed.1. USA: Penguin books, 2008. .

Gaya MLA

Nudge : Improving Decisions About Health, Wealth and Happiness. ed.1. USA: Penguin books, 2008. .

Gaya Turabian

Nudge : Improving Decisions About Health, Wealth and Happiness. USA: Penguin books, 2008. .