Ries, Al 22 Immutable laws of marketing: violate them at your own risk / The 22 immutable laws of marketing: violate them at your own risk / by Al Ries and Jack Trout - USA Harper Business 1994 - xii,143 pages, 20 cm. $16.99TB2353/2 ISBN: 9780887306662 (pbk.) Subjects--Topical Terms: Marketing Dewey Class. No.: 658.8 RIE