Dyfyniad APA

Barrall, I., & Barrall, N. (2008). Intelligent Business Elementary Coursebook. England: Pearson Education Limit.

Dyfyniad Arddull Chicago

Barrall, Irene, và Nikolas Barrall. Intelligent Business Elementary Coursebook. England: Pearson Education Limit, 2008.

Dyfyniad MLA

Barrall, Irene, và Nikolas Barrall. Intelligent Business Elementary Coursebook. England: Pearson Education Limit, 2008.

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