APA

(2003). Cambridge preliminary English test 4 : examination papers from university of cambridge ESOL examinations : English for speakers of other languages. Cambridge: Cambridge University Press.

Chicago

2003. Cambridge preliminary English test 4 : examination papers from university of cambridge ESOL examinations : English for speakers of other languages. Cambridge: Cambridge University Press.

Harvard

(2003). Cambridge preliminary English test 4 : examination papers from university of cambridge ESOL examinations : English for speakers of other languages. Cambridge: Cambridge University Press.

MLA

Cambridge preliminary English test 4 : examination papers from university of cambridge ESOL examinations : English for speakers of other languages. Cambridge: Cambridge University Press. 2003.