APA (7th ed.) Citation
Halpern, D. (2015). Inside the nudge unit: How small changes can make a big difference. WH Allen.
Chicago Style (17th ed.) Citation
Halpern, David. Inside the Nudge Unit: How Small Changes Can Make a Big Difference. London: WH Allen, 2015.
MLA (9th ed.) Citation
Halpern, David. Inside the Nudge Unit: How Small Changes Can Make a Big Difference. WH Allen, 2015.
Warning: These citations may not always be 100% accurate.