Não informado. (2009). International Review for Environmental Strategies. Institute for Global Environmental Strategies.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. International Review for Environmental Strategies. Kanagawa, Japão: Institute for Global Environmental Strategies, 2009.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. International Review for Environmental Strategies. Institute for Global Environmental Strategies, 2009.
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