Sharpe, P. J. (2020). Barron's toefl ibt: With 8 online practice tests (Seventeenth edition.). Barron's.
Lua i Stíl Chicago (17ú heag.)Sharpe, Pamela J. Barron's Toefl Ibt: With 8 Online Practice Tests. Seventeenth edition. New York, NY: Barron's, 2020.
Lua MLA (9ú heag.)Sharpe, Pamela J. Barron's Toefl Ibt: With 8 Online Practice Tests. Seventeenth edition. Barron's, 2020.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.