Cita APA (7th ed.)

ETS. (2021). The Official Guide th the TOEFL i BT. McGrawhill.

Cita Chicago (17th ed.)

ETS. The Official Guide Th the TOEFL I BT. New York: McGrawhill, 2021.

Cita MLA (9th ed.)

ETS. The Official Guide Th the TOEFL I BT. McGrawhill, 2021.