Richards, J. C., Bycina, D., Wisniewska, I., & London, A. (2006). Person to person communicative speaking and listening skills. Test booklet 2 (3a. ed.). Oxford University Press.
Citazione stile Chigago Style (17a edizione)Richards, Jack C., David Bycina, Ingrid Wisniewska, e Andy London. Person to Person Communicative Speaking and Listening Skills. Test Booklet 2. 3a. ed. Nueva York: Oxford University Press, 2006.
Citatione MLA (9a ed.)Richards, Jack C., et al. Person to Person Communicative Speaking and Listening Skills. Test Booklet 2. 3a. ed. Oxford University Press, 2006.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.