Richards, J. C. (1998). New interchange intro: Class audio cassettes [Băng Casset]. Cambridge: Cambridge University Press.
Chicago Style aipamenaRichards, Jack C. New Interchange Intro: Class Audio Cassettes [Băng Casset]. Cambridge: Cambridge University Press, 1998.
MLA aipamenaRichards, Jack C. New Interchange Intro: Class Audio Cassettes [Băng Casset]. Cambridge: Cambridge University Press, 1998.
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