| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Economics Today: Principles and Applications | 978-1-4652-2132-2 (1-4652-2132-8) | 2013 |
| Economics Today: Principles and Applications | 978-0-7575-7741-3 (0-7575-7741-5) | 2012 |
N.R. · N ROBERT · N Ryan · R.R. · R Ryan · Robert R. · Robert Ryan