Rogers, Sandy. Leading loyalty : cracking the code to customer devotion / Sandy Rogers, Leena Rinne, Shawn Moon. - New York : HarperCollins Leadership, an imprint of HarperCollins, 2019. - xii, 206 p. : ill. ; 24 cm Includes bibliographical references and index ISBN: 9780814439395 Subjects--Topical Terms: Customer loyalty. Customer services.