| Building a Mail Order Business | Cohen, William A. | John Wiley |
| Secrets of Special Ops Leadership | Cohen, William A. | Mcgraw-Hill Publ.Comp. |
| A Class with Drucker | Cohen, William A. | Mcgraw-Hill Publ.Comp. |
| A Class With Drucker | Cohen, William A. | |
| A Computer Scientist's Guide to Cell Biology | Cohen, William A. |
