Selling the way your customer buys : understand your prospects' unspoken needs & close every sale / Marvin C. Sadovsky & Jon Caswell. Sadovsky, Marvin C. Caswell, Jon. Selling. HF5438.25 .S23 1996 658.85 20 SAS Includes index. New York : Amacom, c1996. c1996. 1996 Text ix, 166 p. : eng