Universidad Tecnológica de El Salvador

Al Ries

8 Book

The 22 Immutable Laws of Marketing
Al Ries and Jack Trout
Profile Books, 1994
9 Book

Positioning: The Battle For Your Mind
How to Be Seen and Heard in the Overcrowded Marketplace
Jack Trout and Al Ries
McGraw-Hill, 2001
8 Book

Marketing Warfare
Al Ries and Jack Trout
McGraw-Hill, 1986