APA
CULLEN P. . F. A., . (2014). THE OFFICIAL CAMBRIDGE GUIDE TO IELTS FOR ACADEMIC AND GENERAL TRAINING. : CAMBRIDGE UNIVERSITY PRESS, UK.
Chicago
CULLEN PAULINE FRENCH AMANDA, . 2014. THE OFFICIAL CAMBRIDGE GUIDE TO IELTS FOR ACADEMIC AND GENERAL TRAINING. : CAMBRIDGE UNIVERSITY PRESS, UK.
Harvard
CULLEN P. . F. A., . (2014). THE OFFICIAL CAMBRIDGE GUIDE TO IELTS FOR ACADEMIC AND GENERAL TRAINING. : CAMBRIDGE UNIVERSITY PRESS, UK.
MLA
CULLEN PAULINE FRENCH AMANDA, . THE OFFICIAL CAMBRIDGE GUIDE TO IELTS FOR ACADEMIC AND GENERAL TRAINING. : CAMBRIDGE UNIVERSITY PRESS, UK. 2014.