B. D. · Bill Douglas · Billie Douglas · Billie Douglass
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| IP Telephony: The Integration of Robust VolP Services | 978-0-13-014118-7 (0-13-014118-6) | 1999 |
| Putting VoIP to Work: Softswitch Network Design and Testing: Softswitch Network Design and Testing | 978-0-13-040959-1 (0-13-040959-6) | 2001 |