| title | media type | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|---|
| The Ultimate Key to Happiness | Paperback | 978-0-9838183-2-8 (0-9838183-2-0) | 2013 |
| The Ultimate Key to Happiness | Hardcover | 978-0-9838183-0-4 (0-9838183-0-4) | 2012 |
A. S. · R. A. · R. S. · Robert A. · Robert S. · Robert Scheinfeld