Cita APA (7a ed.)

Keller, P. A. (2005). Six sigma demystified. McGraw-Hill.

Cita Chicago Style (17a ed.)

Keller, Paul A. Six Sigma Demystified. New York: McGraw-Hill, 2005.

Cita MLA (8a ed.)

Keller, Paul A. Six Sigma Demystified. McGraw-Hill, 2005.