Cita APA (7a ed.)

Pande, P. S., & Holpp, L. (2002). What is six sigma? (1st edition.). McGraw-Hill.

Cita Chicago Style (17a ed.)

Pande, Peter S., y Lawrence Holpp. What Is Six Sigma? 1st edition. New York, New York: McGraw-Hill, 2002.

Cita MLA (9a ed.)

Pande, Peter S., y Lawrence Holpp. What Is Six Sigma? 1st edition. McGraw-Hill, 2002.