World Health Organization & World Health Organization. Selected synthetic organic fibres.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWorld Health Organization और World Health Organization. Selected Synthetic Organic Fibres.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWorld Health Organization और World Health Organization. Selected Synthetic Organic Fibres.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.