Harden, Leland. Digital engagement : internet marketing that captures customers and builds intense brand loyalty / Leland Harden and Bob Heyman. - New York : American Management Association, c2009. - xii, 244 p. : ill. ; 24 cm. Includes bibliographical references and index. ISBN: 9780814410721 Subjects--Topical Terms: Internet marketing.Brand loyalty. LC Class. No.: HF5415.12 / .H3663 2009