Citazione Stile APA (7a Edizione)

Duckworth, H. A. &. H. (2016). A Six sigma approach to sustainability. CRC Press.

Citazione stile Chigago Style (17a edizione)

Duckworth, Holly A. & Hoffmeier. A Six Sigma Approach to Sustainability. Boca Ratan: CRC Press, 2016.

Citatione MLA (9a ed.)

Duckworth, Holly A. & Hoffmeier. A Six Sigma Approach to Sustainability. CRC Press, 2016.