APA引文

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

Chicago Style (17th ed.) Citation

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

MLA引文

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

警告：這些引文格式不一定是100％准確.