Underhill, P. (2000). Why we buy: The science of shopping. Texere.
Lua i Stíl Chicago (17ú heag.)Underhill, Paco. Why We Buy: The Science of Shopping. London: Texere, 2000.
Lua MLA (9ú heag.)Underhill, Paco. Why We Buy: The Science of Shopping. Texere, 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.