(2004). Cambridge Preliminary English Test 4. With Answers. Cambridge, Cambridge University Press, 2004.
芝加哥风格引文Cambridge Preliminary English Test 4. With Answers. Cambridge, Cambridge University Press, 2004, 2004.
MLA引文Cambridge Preliminary English Test 4. With Answers. Cambridge, Cambridge University Press, 2004, 2004.
警告：这些引文格式不一定是100％准确.