APA (7 वां संस्करण) प्रशस्ति पत्र
Okes, D. (2009). Root cause analysis: The core of problem solving and corrective action. ASQ Quality Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Okes, Duke. Root Cause Analysis: The Core of Problem Solving and Corrective Action. Milwaukee, Wisconsin: ASQ Quality Press, 2009.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Okes, Duke. Root Cause Analysis: The Core of Problem Solving and Corrective Action. ASQ Quality Press, 2009.
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