Não informado. (1948). International Chemical Engineering and Process Industries. Leonard Hill Technical Group.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. International Chemical Engineering and Process Industries. London: Leonard Hill Technical Group, 1948.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. International Chemical Engineering and Process Industries. Leonard Hill Technical Group, 1948.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.
