| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| CENTREX or PBX: The Impact of Internet Protocol | 978-1-58053-497-0 (1-58053-497-X) | 2003 | Mauro Lollo |
| Centrex or Pbx: The Impact of Ip | 978-1-58053-622-6 (1-58053-622-0) | 2003 | " |
| Managers' Guide to Centrex | 978-0-89006-330-9 (0-89006-330-3) | 1988 | |
J. A. · J R · John A. · John Abrahams · John R. · R. A. · R Abrahams