Robert G Nunn. (1997). Water treatment essential for boiler plant operation. New York: McGraw-Hill.
शिकागो स्टाइल उद्धरणRobert G Nunn. Water Treatment Essential for Boiler Plant Operation. New York: McGraw-Hill, 1997.
एमएलए उद्धरणRobert G Nunn. Water Treatment Essential for Boiler Plant Operation. New York: McGraw-Hill, 1997.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.