Não informado. (1953). Fibres, natural and synthetic. Leonard Hill Technical Group.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Fibres, Natural and Synthetic. London: Leonard Hill Technical Group, 1953.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Fibres, Natural and Synthetic. Leonard Hill Technical Group, 1953.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.