The Loyalty Effect: The Hidden Force Behind Growth, Profits, and Lasting Value
by Frederick F. Reichheld
ISBN 13: 9781578516872
Format: Paperback (352 pages) Publisher: Harvard Business Review Press Published: 14 Sep 2001
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Loyalty Rules: How Today's Leaders Build Lasting Relationships
ISBN 13: 9781591393245
Format: Paperback (240 pages) Publisher: Harvard Business Review Press Published: 01 Sep 2003