Engel, James F. Promotional strategy: managing the marketing communications process/ James F.Engel,Marting R.Warshaw,Thomas C.Kinnear. - 6th edition. - Homewood,Illinois: Richard D.Irwin, 1987. - 621p.; 24 cm. - The Irwin series in marketing. . Includes bibliographies and index. ISBN: 0256036438 Subjects--Topical Terms: Advertising.Marketing--Management.