| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Data and File Management for the Ti-99/4A | 978-0-697-09921-1 (0-697-09921-0) | 1984 | John P. Robertson · Henry Zbyszynski |
| IBM Executive Library | 978-0-697-09907-5 (0-697-09907-5) | 1983 | John P. Robertson |