| title | media type | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|---|
| Make Yourself Clear!: Improving Business Communication | Paperback | 978-0-07-043181-2 (0-07-043181-7) | 1980 |
| Make Yourself Clear!: Improving Business Communication | Hardcover | 978-0-07-043180-5 (0-07-043180-9) | 1972 |