APA-referens (7:e uppl.)

Pyzdek, T. (2003). The Six Sigma handbook: A complete guide for green belts, black belts, and managers at all levels (Rev. and expanded ed.). McGraw-Hill.

Chicago-referens (17:e uppl.)

Pyzdek, Thomas. The Six Sigma Handbook: A Complete Guide for Green Belts, Black Belts, and Managers at All Levels. Rev. and expanded ed. New York: McGraw-Hill, 2003.

MLA-referens (9:e uppl.)

Pyzdek, Thomas. The Six Sigma Handbook: A Complete Guide for Green Belts, Black Belts, and Managers at All Levels. Rev. and expanded ed. McGraw-Hill, 2003.