Reichheld

The Loyalty Effect: The Hidden Force Behind Growth, Profits, and Lasting Value

By Reichheld, Frederick F.

The Ultimate Question 2.0 (Revised and Expanded Edition): How Net Promoter Companies Thrive in a Customer-Driven World

By Reichheld, Fred, Markey, Rob

The Ultimate Question: Driving Good Profits and True Growth

By Reichheld, Fred

Quest for Loyalty: Creating Value Through Partnership (Harvard Business Review Book Series,)

By Reichheld, Frederick F., Cook, Scott