| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Certified Six Sigma Black Belt Exam Flashcard Study System: CSSBB Test Practice Questions & Review for the Six Sigma Black Belt Certification Exam | 978-1-61072-874-4 (1-61072-874-2) | 2013 |
| Certified Six Sigma Black Belt Exam Secrets Study Guide: CSSBB Test Review for the Six Sigma Black Belt Certification Exam | 978-1-61072-873-7 (1-61072-873-4) | 2013 |
| Certified Six Sigma Black Belt Exam Secrets Study Guide: CSSBB Test Review for the Six Sigma Black Belt Certification Exam | 978-1-61403-411-7 (1-61403-411-7) | 2013 |