Trích dẫn APA

Cambridge English language assessment. (2017). Cambridge English IELTS 9 with answers: Authentic examination papers from Cambridge Esol. England: Cambridge University press.

Trích dẫn kiểu Chicago

Cambridge English language assessment. Cambridge English IELTS 9 With Answers: Authentic Examination Papers From Cambridge Esol. England: Cambridge University press, 2017.

Trích dẫn MLA

Cambridge English language assessment. Cambridge English IELTS 9 With Answers: Authentic Examination Papers From Cambridge Esol. England: Cambridge University press, 2017.

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