Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.