Sharpe, P. J. (2020). Barron's toefl ibt: With 8 online practice tests (Seventeenth edition.). Barron's.
Chicago-čujuhus (17. p.)Sharpe, Pamela J. Barron's Toefl Ibt: With 8 Online Practice Tests. Seventeenth edition. New York, NY: Barron's, 2020.
MLA-čujuhus (9. p.)Sharpe, Pamela J. Barron's Toefl Ibt: With 8 Online Practice Tests. Seventeenth edition. Barron's, 2020.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.