APA (7th ed.) Citation

Farmer, E. L., & Duffy, G. L. (2022). The ASQ certified six sigma yellow belt study guide (Second edition.). ASQ Excellence.

Chicago Style (17th ed.) Citation

Farmer, Erica L., and Grace L. Duffy. The ASQ Certified Six Sigma Yellow Belt Study Guide. Second edition. Milwaukee, WI: ASQ Excellence, 2022.

MLA (9th ed.) Citation

Farmer, Erica L., and Grace L. Duffy. The ASQ Certified Six Sigma Yellow Belt Study Guide. Second edition. ASQ Excellence, 2022.