Richards, J. C., Bycina, D., & Wisniewska, I. (2005). Person to person: Communicative speaking and listening skills (3rd ed.). Oxford.
Cita Chicago (17th ed.)Richards, Jack C., David Bycina, i Ingrid Wisniewska. Person to Person: Communicative Speaking and Listening Skills. 3rd ed. New York: Oxford, 2005.
Cita MLA (8th ed.)Richards, Jack C., et al. Person to Person: Communicative Speaking and Listening Skills. 3rd ed. Oxford, 2005.
Atenció: Aquestes cites poden no estar 100% correctes.