APA-referens (7:e uppl.)

Chowdhury, S. (2001). The power of six sigma. Pearson Education Asia.

Chicago-referens (17:e uppl.)

Chowdhury, Subir. The Power of Six Sigma. Delhi: Pearson Education Asia, 2001.

MLA-referens (9:e uppl.)

Chowdhury, Subir. The Power of Six Sigma. Pearson Education Asia, 2001.