APA (7th ed.) Citation

Princeton Review (Firm). (2020). TOEFL iBT prep. The Princeton Review, Inc. ; Penguin Random House.

Chicago Style (17th ed.) Citation

Princeton Review (Firm). TOEFL IBT Prep. New York, NY: The Princeton Review, Inc. ; Penguin Random House, 2020.

MLA (9th ed.) Citation

Princeton Review (Firm). TOEFL IBT Prep. The Princeton Review, Inc. ; Penguin Random House, 2020.

Warning: These citations may not always be 100% accurate.