R. A. · Robert A. · Robert Allan Harper · Robert Allan Smith · Robert J. Allan
McGraw-Hill · Patmos · Penguin Books Ltd
| title | ISBN-13 (ISBN-10) | year of publica- tion | |
|---|---|---|---|
| Endlich 50!: Was Sie schon immer tun wollten | 978-3-491-45081-3 (3-491-45081-0) | 2006 | |
| Getting Control of Your Anger: A Clinically-Proven, 3-Step Program for Getting to the Root of the Problem and Resolving It | 978-0-07-144884-0 (0-07-144884-5) | 2005 | |
| Penguin English Dictionary | 978-0-14-051533-6 (0-14-051533-X) | 2003 |