APA citiranje

(2017). TOEFL iBT prep plus 2018-2019: 4 practice tests + proven strategies + online + audio. New York: Kaplan Publishing.

Trích dẫn kiểu Chicago

TOEFL IBT Prep Plus 2018-2019: 4 Practice Tests + Proven Strategies + Online + Audio. New York: Kaplan Publishing, 2017.

MLA citiranje

TOEFL IBT Prep Plus 2018-2019: 4 Practice Tests + Proven Strategies + Online + Audio. New York: Kaplan Publishing, 2017.