Bill Harris · Bill Horrocks · Billy Harris
| title | media type | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|---|
| Hersey's Executive Memory Program | Paperback | 978-0-13-387143-2 (0-13-387143-6) | 1990 |
| Hersey's Executive Memory Program | Hardcover | 978-0-13-387168-5 (0-13-387168-1) | 1988 |