Não informado. (1969). Journal of Quality Technology. American Society for Quality Control.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Journal of Quality Technology. Milwaukee, Wis: American Society for Quality Control, 1969.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Journal of Quality Technology. American Society for Quality Control, 1969.
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