| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Harvard business review--on management | 978-0-06-091285-7 (0-06-091285-5) | 1985 |
| Off the Beaten Track: Austria | 978-0-06-096378-1 (0-06-096378-6) | 1989 |
| Off the Beaten Track: West Germany | 978-0-06-096379-8 (0-06-096379-4) | 1989 |