| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Certified Six Sigma Yellow Belt Exam Flashcard Study System: CSSGB Test Practice Questions & Review for the Six Sigma Yellow Belt Certification Exam | 978-1-5167-0031-8 (1-5167-0031-7) | 2015 |
| Certified Six Sigma Yellow Belt Exam Secrets Study Guide: CSSGB Test Review for the Six Sigma Yellow Belt Certification Exam | 978-1-5167-0030-1 (1-5167-0030-9) | 2015 |