Roy, S. (2003). Environmental Science: A Comprehensive Treatise on Ecology and Environment. Publishing Syndicate.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRoy, Sovan. Environmental Science: A Comprehensive Treatise on Ecology and Environment. Publishing Syndicate, 2003.
एमएलए (9वां संस्करण) प्रशस्ति पत्रRoy, Sovan. Environmental Science: A Comprehensive Treatise on Ecology and Environment. Publishing Syndicate, 2003.
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