Cita APA (7a ed.)

(2021). The Official guide to the TOEFL iBT® test (Sixth edition.). McGraw-Hill Education.

Cita Chicago Style (17a ed.)

The Official Guide to the TOEFL IBT® Test. Sixth edition. New York: McGraw-Hill Education, 2021.

Cita MLA (9a ed.)

The Official Guide to the TOEFL IBT® Test. Sixth edition. McGraw-Hill Education, 2021.