Knowles Graeme & bookboon.com. Six Sigma.
Cita Chicago (17th ed.)Knowles Graeme i bookboon.com. Six Sigma.
Cita MLA (9th ed.)Knowles Graeme i bookboon.com. Six Sigma.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)