Trích dẫn APA

Gairns Ruth. (2010). Natural English: Upper-Intermediate student's book. Anh: Oxford University.

Trích dẫn kiểu Chicago

Gairns Ruth. Natural English: Upper-Intermediate Student's Book. Anh: Oxford University, 2010.

MLA Trích dẫn

Gairns Ruth. Natural English: Upper-Intermediate Student's Book. Anh: Oxford University, 2010.

Warning: These citations may not always be 100% accurate.