Gaya APA

Davis, K. (1996). Getting into your customer's head : 8 secret roles of selling your competitors don't know (1st ed.). United States of America: Times Books.

Gaya MLA

Davis, Kevin. "Getting into your customer's head : 8 secret roles of selling your competitors don't know". 1st ed. United States of America: Times Books, 1996. Printed Book.