Gilpin, A. (1996). Dictionary of environment and sustainable development. Chichester: John Wiley.
शिकागो स्टाइल उद्धरणGilpin, Alan. Dictionary of Environment and Sustainable Development. Chichester: John Wiley, 1996.
एमएलए उद्धरणGilpin, Alan. Dictionary of Environment and Sustainable Development. Chichester: John Wiley, 1996.
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