Swan, M., & Walter, C. (1991). The Cambridge English Course: T. I. Practice Book. New York: Cambridge University Press.
Čikaški stil citiranjaSwan, Michael, i Catherine Walter. The Cambridge English Course: T. I. Practice Book. New York: Cambridge University Press, 1991.
MLA način citiranjaSwan, Michael, i Catherine Walter. The Cambridge English Course: T. I. Practice Book. New York: Cambridge University Press, 1991.
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