Não informado. Soviet plastics. Rubber and Plastics Research Association of Great Britain.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Soviet Plastics. London: Rubber and Plastics Research Association of Great Britain.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Soviet Plastics. Rubber and Plastics Research Association of Great Britain.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.