Paul Unterberg ยท Paul Unterkircher
| title | media type | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|---|
| Art of Enterprise: Business Toolkit | Paperback | 978-1-910546-00-0 (1-910546-00-3) | 2015 |
| Art of Enterprise: Business Toolkit | Hardcover | 978-1-910546-01-7 (1-910546-01-1) | 2015 |