Citazione Stile APA (7a Edizione)

Spenley, P. (1995). Step change total quality: Achieving world class business performance (2nd ed.). Chapman & Hall.

Citazione stile Chigago Style (17a edizione)

Spenley, Paul. Step Change Total Quality: Achieving World Class Business Performance. 2nd ed. London: Chapman & Hall, 1995.

Citatione MLA (9a ed.)

Spenley, Paul. Step Change Total Quality: Achieving World Class Business Performance. 2nd ed. Chapman & Hall, 1995.