Engel, James F. Promotional strategy : managing the marketing communication process / James F. Angel, Martin R. Warshaw and Thomas C. Kinnear. - 6th ed. - Singapore : Richard D. Irwin, 1989 - xvi, 621 p. : ill. ; 22 cm. ISBN: 0256036438 Subjects--Topical Terms: Marketing--Management Dewey Class. No.: 658.82 / E57P 1989