H.S. · H. S. W. · H.W. · S. W.
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Infopreneurs: Turning Data Into Dollars | 978-0-471-52824-1 (0-471-52824-2) | 1991 |
| Telephone Magic: How to Tap the Phone's Marketing Potential in Your Business | 978-0-07-069124-7 (0-07-069124-X) | 1986 |