Hase, Stefan, The quintessence of sales : what you really need to know to be successful in sales / Stefan Hase, Corinna Busch - 131 pages : illustrations ; 24 cm. - Quintessence series . - Quintessence series (Springer (Firm)) . Includes bibliographical references ISBN: 9783319611723 Subjects--Topical Terms: Sales managementSales personnelSales executivesSelling