| title | ISBN-13 | year of publication |
|---|---|---|
| Secret Service: Hidden Systems That Deliver Unforgettable Customer Service | 978-0-8144-7171-5 | 2003 |
| The Customer Service Revolution: Overthrow Conventional Business, Inspire Employees, and Change the World | 978-1-62634-129-6 | 2015 |
| The Relationship Economy: Building Stronger Customer Connections in the Digital Age | 978-1-62634-643-7 | 2019 |
| What's the Secret? To Providing a World-Class Customer Experience | 978-0-470-19612-0 | 2008 |
D. I · J.D. · J. I. · J R · John D. · John I · John R. · John R. DiJulius · R.D.
AMACOM · Greenleaf Book Group Press · Wiley