| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Certified Six Sigma Green Belt Exam Flashcard Study System: CSSGB Test Practice Questions & Review for the Six Sigma Green Belt Certification Exam | 978-1-61072-876-8 (1-61072-876-9) | 2013 |
| Certified Six Sigma Green Belt Exam Secrets Study Guide: CSSGB Test Review for the Six Sigma Green Belt Certification Exam | 978-1-61072-875-1 (1-61072-875-0) | 2013 |