| title | ISBN-13 | year of publica- tion | other author(s) | |
|---|---|---|---|---|
| ABAP Objects-Referenz | 978-3-934358-61-4 | 2002 | Horst Keller | |
| ABAP Objects: The Official Reference | 978-1-59229-011-6 | 2002 | " | |
| ABAP Referenz , mit 3 CD-ROMs | 978-3-89842-444-8 | 2004 | " | |
| The Official ABAP Reference | 978-1-59229-039-0 | 2005 | " |