Cambridge University. (2013). Cambridge Certificate in Advanced English 1 with answers. United Kingdom: Cambridge university Press.
Trích dẫn kiểu ChicagoCambridge University. Cambridge Certificate in Advanced English 1 With Answers. United Kingdom: Cambridge university Press, 2013.
MLA引文Cambridge University. Cambridge Certificate in Advanced English 1 With Answers. United Kingdom: Cambridge university Press, 2013.
警告:这些引文格式不一定是100%准确.