Richards, J. C. New Interchange: English for international communication. Student's book 1A (3a ed.).
Citazione stile Chigago Style (17a edizione)Richards, Jack C. New Interchange: English for International Communication. Student's Book 1A. 3a ed.
Citatione MLA (8a ed.)Richards, Jack C. New Interchange: English for International Communication. Student's Book 1A. 3a ed.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.