| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Sap Processes: Sales and Customer Service | 978-0-201-71515-6 (0-201-71515-5) | 2002 | Thomas Teufel · Peter Willems |
| SAP Process, Sales and Distribution and Customer Service | 978-0-201-71514-9 (0-201-71514-7) | 2003 | Thomas Teufel · Peter Willems |