| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Opportunities in Music Careers | 978-0-07-138717-0 (0-07-138717-X) | 2002 |
| Opportunities in Music Careers, Revised Edition | 978-0-07-138716-3 (0-07-138716-1) | 2002 |
Robert G. · Robert Gerhard · Robert Gerwarth · Robert Girard · Robert Girardi · Robert Girouard · Roberto Gerhard · Roberto Ghirardelli