Não informado. (1982). Industrial Statistics Yearbook. United Nations Publications.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Industrial Statistics Yearbook. New York: United Nations Publications, 1982.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Industrial Statistics Yearbook. United Nations Publications, 1982.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.