Citazione Stile APA (7a Edizione)

Sharpe, P. J. (2020). Barron's toefl ibt: With 8 online practice tests (Seventeenth edition.). Barron's.

Citazione stile Chigago Style (17a edizione)

Sharpe, Pamela J. Barron's Toefl Ibt: With 8 Online Practice Tests. Seventeenth edition. New York, NY: Barron's, 2020.

Citatione MLA (9a ed.)

Sharpe, Pamela J. Barron's Toefl Ibt: With 8 Online Practice Tests. Seventeenth edition. Barron's, 2020.