Gutjahr, L. (2009). English for sales and purchasing. Oxford University Press.
शिकागो स्टाइल उद्धरणGutjahr, Lothanr. English for Sales and Purchasing. Oxford University Press, 2009.
एमएलए उद्धरणGutjahr, Lothanr. English for Sales and Purchasing. Oxford University Press, 2009.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.