Sumanth, D. J. (1994). Productivity engineering and management. New York: McGraw-Hill.
शिकागो स्टाइल उद्धरणSumanth, David J. Productivity Engineering and Management. New York: McGraw-Hill, 1994.
एमएलए उद्धरणSumanth, David J. Productivity Engineering and Management. New York: McGraw-Hill, 1994.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.