| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Why Service Matters: A Collection of Essays That Will Change How You Think About Service | 978-1-7957-3478-3 (1-7957-3478-7) | 2019 |
| Why Service Matters: A Collection of Essays That Will Change How You Think About Service | 978-1-7939-5592-0 (1-7939-5592-1) | 2018 |