Não informado. (1990). Danish Dairy and Food Industry Worldwide. Danish Dairy Engineers Association.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Danish Dairy and Food Industry Worldwide. Odense, Dinamarca: Danish Dairy Engineers Association, 1990.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Danish Dairy and Food Industry Worldwide. Danish Dairy Engineers Association, 1990.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.