The silent salesman : guaranteed strategies for increasing sales and profits using promotional products 
Carson, Mitch. 
 -  John Wiley & Sons, Inc.  2009 
 - xvii, 280 pages. 
978-0-470-27035-6
Marketing.
658.82 C23s 2009
                        978-0-470-27035-6
Marketing.
658.82 C23s 2009