APA citiranje

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

Trích dẫn kiểu Chicago

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

MLA citiranje

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