Johnston, Mark W. Churchill/Ford/Walkers sales force management / Sales force management Mark W. Johnston, Greg W. Marshall. - 8th ed. - Boston :. Irwin/McGraw-Hill, 2006. - xvii, 491 p. : ill ; 26 cm. - McGraw-Hill/Irwin series in marketing . Includes bibliographical references and index. ISBN: 9780071116053 Subjects--Topical Terms: Sales management.