Richards, J. C. (1996). Interchange: English for international communication: lab guide. 2.
Citazione stile Chigago Style (17a edizione)Richards, Jack C. Interchange: English for International Communication: Lab Guide. 2. Cambridge, 1996.
Citatione MLA (9a ed.)Richards, Jack C. Interchange: English for International Communication: Lab Guide. 2. 1996.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.