Marks, Ronald B., 1944- Personal selling : a relationship approach / Ronald B. Marks. - 6th ed. - Upper Saddle River, N.J. : Prentice Hall, c1997. - xix, 587 p. : ill. (some col.) ; 26 cm. Includes bibliographical references and index. ISBN: 0132428849 LCCN: 96029159 Subjects--Topical Terms: Selling.Selling--Psychological aspects.Selling--Vocational guidance. LC Class. No.: HF5438.25 / .M37 1997 Dewey Class. No.: 658.85