APA Style
Preliminary English Test For Schools 1 : With Answers+CD. (2011).
New York:
Cambridge.
Chicago Style
Preliminary English Test For Schools 1 : With Answers+CD.
1.
New York:
Cambridge,
2011.
.
MLA Style
Preliminary English Test For Schools 1 : With Answers+CD.
1.
New York:
Cambridge,
2011.
.
Turabian Style
Preliminary English Test For Schools 1 : With Answers+CD.
New York:
Cambridge,
2011.
.