| title | ISBN-13 (ISBN-10) | year of publica- tion |
|---|---|---|
| Threats to Homeland Security | 978-0-470-07398-8 (0-470-07398-5) | 2008 |
| Wiley Pathways Threats to Homeland Security | 978-0-470-48284-1 (0-470-48284-2) | 2009 |
R.K. · Richard Kähler · Richard Keeler · Richard Keller · Richard Köhler · Richard Köller