Sharpe, P. J. (2020). Barron's toefl ibt: With 8 online practice tests (Seventeenth edition.). Barron's.
Čikaški stil citiranja (17. izdanje)Sharpe, Pamela J. Barron's Toefl Ibt: With 8 Online Practice Tests. Seventeenth edition. New York, NY: Barron's, 2020.
MLA način citiranja (9. izdanje)Sharpe, Pamela J. Barron's Toefl Ibt: With 8 Online Practice Tests. Seventeenth edition. Barron's, 2020.
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