Não informado. (1972). Ambio: A journal of the human environment, research and management. Royal Swedish Academy of Sciences.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Ambio: A Journal of the Human Environment, Research and Management. Stockholm: Royal Swedish Academy of Sciences, 1972.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Ambio: A Journal of the Human Environment, Research and Management. Royal Swedish Academy of Sciences, 1972.
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