APA
(2010). Official IELTS practice materials 2. Cambridge, U.K: University of Cambridge, ESOL Examinations.
Chicago
2010. Official IELTS practice materials 2. Cambridge, U.K: University of Cambridge, ESOL Examinations.
Harvard
(2010). Official IELTS practice materials 2. Cambridge, U.K: University of Cambridge, ESOL Examinations.
MLA
Official IELTS practice materials 2. Cambridge, U.K: University of Cambridge, ESOL Examinations. 2010.