| title | media type | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|---|
| Bootstrap Business: A Step-by-Step Business Survival Guide | Paperback | 978-1-932226-72-0 (1-932226-72-9) | 2009 | Ron E. Porter |
| The Zigzag Principle: The Goal Setting Strategy that will Revolutionize Your Business and Your Life | Hardcover | 978-0-07-177458-1 (0-07-177458-0) | 2011 | |
| The Zigzag Principle: The Goal Setting Strategy that will Revolutionize Your Business and Your Life | Taschenbuch | 978-1-259-00537-4 (1-259-00537-2) | 2011 | |
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