| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Hygiene for Management | 978-1-906404-71-0 (1-906404-71-2) | 2009 |
| Hygiene for Management | 978-1-904544-79-1 (1-904544-79-7) |
Christian Marc Richard Sprenger · R. S. · R. Sprenger · Richard A. Sprenger · Richard Anthony Sprenger · Richard S.