G. C. · G. Colombo · George-C · George W. Colombo
| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Absolute Beginner's Guide to Podcasting | 978-0-7897-3455-6 (0-7897-3455-9) | 2005 | Curtis Franklin Jr. |
| Killer Customer Care: How to Provide Five Star Service That Will Double and Triple Profits | 978-1-891984-86-0 (1-891984-86-1) | 2003 | |