APA-viite (7. p.)

Pyzdek, T., & Keller, P. A. (2018). The six sigma handbook (Fifth edition.). McGraw-Hill Education.

Chicago-viite (17. p.)

Pyzdek, Thomas, ja Paul A. Keller. The Six Sigma Handbook. Fifth edition. New York: McGraw-Hill Education, 2018.

MLA-viite (9. p.)

Pyzdek, Thomas, ja Paul A. Keller. The Six Sigma Handbook. Fifth edition. McGraw-Hill Education, 2018.