Thornton, A. C. (2004). Variation risk managemnetfocusing quality improvements in product development and productionAnna C. Thornton. John Wiley & Sons.
Lua i Stíl Chicago (17ú heag.)Thornton, Anna C. Variation Risk Managemnetfocusing Quality Improvements in Product Development and ProductionAnna C. Thornton. John Wiley & Sons, 2004.
Lua MLA (8ú heag.)Thornton, Anna C. Variation Risk Managemnetfocusing Quality Improvements in Product Development and ProductionAnna C. Thornton. John Wiley & Sons, 2004.
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