APA (7th ed.) Citation

Underhill, P. (2009). Why we buy: The science of shopping. Simon & Schuster paperbacks.

Chicago Style (17th ed.) Citation

Underhill, Paco. Why We Buy: The Science of Shopping. New York: Simon & Schuster paperbacks, 2009.

MLA (8th ed.) Citation

Underhill, Paco. Why We Buy: The Science of Shopping. Simon & Schuster paperbacks, 2009.