APA ציטוט

Gutjahr, L. (2009). English for sales and purchasing. Oxford University Press.

Trích dẫn kiểu Chicago

Gutjahr, Lothanr. English for Sales and Purchasing. Oxford University Press, 2009.

ציטוט MLA

Gutjahr, Lothanr. English for Sales and Purchasing. Oxford University Press, 2009.