Harry, M. (2000). Six Sigma. Doubleday( Random House).
Cita Chicago (17th ed.)Harry, Mikel. Six Sigma. Doubleday( Random House), 2000.
Cita MLA (9th ed.)Harry, Mikel. Six Sigma. Doubleday( Random House), 2000.
Atenció: Aquestes cites poden no estar 100% correctes.