Clarke, J. (1993). Nature in question: An anthology of ideas and arguments. Earthscan.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रClarke, J.J. Nature in Question: An Anthology of Ideas and Arguments. London: Earthscan, 1993.
एमएलए (9वां संस्करण) प्रशस्ति पत्रClarke, J.J. Nature in Question: An Anthology of Ideas and Arguments. Earthscan, 1993.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.