Bernard Hiller · Bernhard Haller
HarperBusiness · Prentice Hall
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| 100 Most Difficult Business Letters You'll Ever Have to Write, Fax, or E-Mail, T | 978-0-88730-683-9 (0-88730-683-7) | 1994 |
| Manager's Portfolio of Hard to Write Business Letters | 978-0-13-532441-7 (0-13-532441-6) | 1997 |