| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Future Proof Sales Strategy: 7 Steps to Rise Above the Chaos, and Transform Your Team and Take Charge of Your Career | 978-O-64843O7-2-8 (O-64843O7-2-3) | 2019 |
[s.n.] · Stefan Niermann · Stephan Niermann · Stephanie Norman