Não informado. (1962). Quality. European Organization for Quality Control.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Quality. Rotterdam, Holanda: European Organization for Quality Control, 1962.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Quality. European Organization for Quality Control, 1962.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.