Pierce, D. (2005). Cracking the TOEFL iBT. New York: Random House, Inc.
Čikaški stil citiranjaPierce, Douglas. Cracking the TOEFL IBT. New York: Random House, Inc, 2005.
MLA način citiranjaPierce, Douglas. Cracking the TOEFL IBT. New York: Random House, Inc, 2005.
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