| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| CCNA Certification Kit, 4th Edition | 978-0-7821-4393-5 | 2005 | Todd Lammle |
| CCNA Virtual Lab, Gold Edition | 978-0-7821-3018-8 | 2001 | Todd Lammle · Bill Tedder |
| CCNA Virtual Lab, Platinum Edition | 978-0-7821-3037-9 | 2003 | Todd Lammle |
| CCNP Virtual Lab | 978-0-7821-5025-4 | 2003 | " |
| Network+ Study Guide, Deluxe Edition | 978-0-7821-4275-4 | 2003 | David Groth · Todd Lammle · William Tedder |
| Network+ Study Guide: Exam N10-003, Deluxe, 2nd Edition | 978-0-7821-4416-1 | 2005 | David Groth · Toby Skandier · Todd Lammle |
D. T. · W. T. · William D. · William T · William Tedder