APA (7th ed.) Citation

Understanding TOEFL: [Test of English as a Foreign Language]. Educational Testing Service.

Chicago Style (17th ed.) Citation

Understanding TOEFL: [Test of English as a Foreign Language]. Princeton, NJ: Educational Testing Service.

MLA (9th ed.) Citation

Understanding TOEFL: [Test of English as a Foreign Language]. Educational Testing Service.

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