APA Style
Preliminary English Test 4 ( With Answer ). (2007).
New York:
Cambridge.
Chicago Style
Preliminary English Test 4 ( With Answer ).
7.
New York:
Cambridge,
2007.
.
MLA Style
Preliminary English Test 4 ( With Answer ).
7.
New York:
Cambridge,
2007.
.
Turabian Style
Preliminary English Test 4 ( With Answer ).
New York:
Cambridge,
2007.
.