Cita APA (7th ed.)

Pyzdek, T., & Keller, P. (2014). The six sigma handbook (4a. ed.). McGraw Hill.

Cita Chicago (17th ed.)

Pyzdek, Thomas, i Paul Keller. The Six Sigma Handbook. 4a. ed. Nueva York: McGraw Hill, 2014.

Cita MLA (9th ed.)

Pyzdek, Thomas, i Paul Keller. The Six Sigma Handbook. 4a. ed. McGraw Hill, 2014.