Nicholas (Nicholas Wittenberg) Wittenberg · Nicholas W.
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Student CD for Wittenberg's Understanding Voice Over IP Technology | 978-1-111-53709-8 (1-111-53709-7) | 2009 |
| Understanding Voice Over IP Technology | 978-1-4354-2727-3 (1-4354-2727-0) | 2009 |