Não informado. (2004). Quarterly Journal of the Geological Society of London. Geological Society of London.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Quarterly Journal of the Geological Society of London. London: Geological Society of London, 2004.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Quarterly Journal of the Geological Society of London. Geological Society of London, 2004.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.