APA (7th ed.) Citation

Underhill, P. (2009). Why we buy : the science of shopping / Paco Underhill: The science of shopping (Updated and rev. ed.). Simon & Schuster.

Chicago Style (17th ed.) Citation

Underhill, Paco. Why We Buy : The Science of Shopping / Paco Underhill: The Science of Shopping. Updated and rev. ed. New York: Simon & Schuster, 2009.

MLA (9th ed.) Citation

Underhill, Paco. Why We Buy : The Science of Shopping / Paco Underhill: The Science of Shopping. Updated and rev. ed. Simon & Schuster, 2009.

Warning: These citations may not always be 100% accurate.