Dyfyniad APA

Barrall, I. (2009). Intelligent business coursebook upper intermediate. Oxford University Press.

Dyfyniad Arddull Chicago

Barrall, Irene. Intelligent Business Coursebook Upper Intermediate. Oxford University Press, 2009.

Dyfyniad MLA

Barrall, Irene. Intelligent Business Coursebook Upper Intermediate. Oxford University Press, 2009.

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