Cunningham, W. P. (2004). Principles of environmental science: Inquiry and Applications. Boston, MA: McGraw-Hill.
शिकागो स्टाइल उद्धरणCunningham, William P. Principles of Environmental Science: Inquiry and Applications. Boston, MA: McGraw-Hill, 2004.
एमएलए उद्धरणCunningham, William P. Principles of Environmental Science: Inquiry and Applications. Boston, MA: McGraw-Hill, 2004.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.