Richards, J. C., Bycina, D., & Wisniewska, I. (2005). Person to person: Communicative speaking and listening skills (3rd ed.). Oxford.
Lua i Stíl Chicago (17ú heag.)Richards, Jack C., David Bycina, agus Ingrid Wisniewska. Person to Person: Communicative Speaking and Listening Skills. 3rd ed. New York: Oxford, 2005.
Lua MLA (8ú heag.)Richards, Jack C., et al. Person to Person: Communicative Speaking and Listening Skills. 3rd ed. Oxford, 2005.
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