Haber, L. F. (1966). The nitrogen problem. Published for the Nuffield Foundation by the Longmans/ Penguin Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHaber, L. F. The Nitrogen Problem. London: Published for the Nuffield Foundation by the Longmans/ Penguin Books, 1966.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHaber, L. F. The Nitrogen Problem. Published for the Nuffield Foundation by the Longmans/ Penguin Books, 1966.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.