Cita APA (7a ed.)

Gupta, P. (2007). Six Sigma Business scorecard (2nd ed.). McGraw-Hill.

Cita Chicago Style (17a ed.)

Gupta, Praveen. Six Sigma Business Scorecard. 2nd ed. New York: McGraw-Hill, 2007.

Cita MLA (8a ed.)

Gupta, Praveen. Six Sigma Business Scorecard. 2nd ed. McGraw-Hill, 2007.