Nautiyal. Shivanand. (2012). Paryavaran: Samasya aur samadhan. Samayik prakashan.
शिकागो स्टाइल उद्धरणNautiyal. Shivanand. Paryavaran: Samasya Aur Samadhan. New Delhi: Samayik prakashan, 2012.
एमएलए उद्धरणNautiyal. Shivanand. Paryavaran: Samasya Aur Samadhan. Samayik prakashan, 2012.
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