Lawrence, E. (1998). Longman dictionary of environmental science. Essex: Longman.
शिकागो स्टाइल उद्धरणLawrence, Eleanor. Longman Dictionary of Environmental Science. Essex: Longman, 1998.
एमएलए उद्धरणLawrence, Eleanor. Longman Dictionary of Environmental Science. Essex: Longman, 1998.
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