Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

Pande, Peter S., y Larry Holpp. What Is Six Sigma? New York [etc.]: McGraw-Hill, 2002.

Cita MLA (9a ed.)

Pande, Peter S., y Larry Holpp. What Is Six Sigma? McGraw-Hill, 2002.