Citazione Stile APA (7a Edizione)

Witt, R. d. (2008). How to Prepare for IELTS. The British Council.

Citazione stile Chigago Style (17a edizione)

Witt, Ray de. How to Prepare for IELTS. New Delhi: The British Council, 2008.

Citatione MLA (9a ed.)

Witt, Ray de. How to Prepare for IELTS. The British Council, 2008.