Kravis, I. B. (1971). Price competitiveness in world trade. New York: National Bureau of Economic Research.
शिकागो स्टाइल उद्धरणKravis, Irving B. Price Competitiveness in World Trade. New York: National Bureau of Economic Research, 1971.
एमएलए उद्धरणKravis, Irving B. Price Competitiveness in World Trade. New York: National Bureau of Economic Research, 1971.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.