Gaya APA

Pyzdek, T. (2001). The six sigma handbook ; a complete guide for greenbelts, blackbelts, and managers at all levels . New York: McGraw-Hill Inc..

Gaya MLA

Pyzdek, Thomas. "The six sigma handbook ; a complete guide for greenbelts, blackbelts, and managers at all levels". New York: McGraw-Hill Inc., 2001. Text.