D'Innocenzo, Len. The agile manager's guide to customer-focused selling / by Len D'Innocenzo and Jack Cullen. - Bristol, Vt., USA : Velocity Business Pub., 2000. - 110 p. ; 22 cm. - The agile manager series . Includes index. ISBN: 1580990126 Subjects--Topical Terms: Selling. Dewey Class. No.: 658.812 / DIC 2000