Citazione Stile APA (7a Edizione)

Marian Cox. (2014). Cambridge Checkpoint English Coursebook 9 (Cambridge International Examinations). CAMBRIDGE UNIVERSITY PRESS.

Citazione stile Chigago Style (17a edizione)

Marian Cox. Cambridge Checkpoint English Coursebook 9 (Cambridge International Examinations). CAMBRIDGE UNIVERSITY PRESS, 2014.

Citatione MLA (9a ed.)

Marian Cox. Cambridge Checkpoint English Coursebook 9 (Cambridge International Examinations). CAMBRIDGE UNIVERSITY PRESS, 2014.