Trích dẫn APA

Cambridge University. (2013). Certificate in advanced English 4: Official examination papers from University of cambridge ESOL examinations: With answers.- 4th printing. Anh: Cambridge University.

Trích dẫn kiểu Chicago

Cambridge University. Certificate in Advanced English 4: Official Examination Papers From University of Cambridge ESOL Examinations: With Answers.- 4th Printing. Anh: Cambridge University, 2013.

MLA Trích dẫn

Cambridge University. Certificate in Advanced English 4: Official Examination Papers From University of Cambridge ESOL Examinations: With Answers.- 4th Printing. Anh: Cambridge University, 2013.

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