Sheehan, Don. !Cállese y venda! técnicas comprobadas para cerrar la venta Don Sheehan ; traductora, Adriana Arias de Hassan. - Bogotá Editorial Norma c1984. - [6] 179 p. Translation of : Shut up and sell. Includes index. Bibliography : p. 170. ISBN: 8482764039 10.95 LCCN: 91061443 Subjects--Topical Terms: Selling LC Class. No.: HF5438.25 / .S477 Dewey Class. No.: 658.8/5