Hanan, Mack. Sales shock! : the end of selling products, the rise of comanaging customers / Mack Hanan. - New York : AMACOM, c1996. - xvi, 152 p. : ill. ; 24 cm. ISBN: 0814402488 (hardcover) LCCN: 95049738 LC Class. No.: HF5438.25 .H3523 1996 / .H3523 1996 Dewey Class. No.: 658.8/1