| title | media type | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|---|
| Keeping the Faith: How Applying Spiritual Purpose to Your Work Can Lead to Extraordinary Success | Paperback | 978-0-06-112595-9 (0-06-112595-4) | 2008 |
| Keeping the Faith: How Applying Spiritual Purpose to Your Work Can Lead to Extraordinary Success | Hardcover | 978-0-06-112592-8 (0-06-112592-X) | 2007 |