Silver, E. A. A., George, M. L., Maxey, J., Price, M., Rowlands, D., & George, M. L. The lean Six Sigma pocket toolbook: A quick reference guide to nearly 100 tools for improving process quality, speed, and complexity /Michael L. George ... [et al.]. McGraw-Hill.

Silver, Edward A.(Edward Allen),1937-author, Michael L. George, John Maxey, Mark Price, David Rowlands, và Michael L.  George. The Lean Six Sigma Pocket Toolbook: A Quick Reference Guide to Nearly 100 Tools for Improving Process Quality, Speed, and Complexity /Michael L. George ... [et Al.]. McGraw-Hill.

Silver, Edward A.(Edward Allen),1937-author, et al. The Lean Six Sigma Pocket Toolbook: A Quick Reference Guide to Nearly 100 Tools for Improving Process Quality, Speed, and Complexity /Michael L. George ... [et Al.]. McGraw-Hill.