Gaya APA

Baum, Catherine; et.all. (2019). TOEFL iBT Prep Plus 2020-2021 . New York: Kaplan Publishing.

Gaya Chicago

Baum, Catherine; et.all. TOEFL iBT Prep Plus 2020-2021. New York: Kaplan Publishing, 2019. Teks.

Gaya MLA

Baum, Catherine; et.all. TOEFL iBT Prep Plus 2020-2021. New York: Kaplan Publishing, 2019. Teks.

Gaya Turabian

Baum, Catherine; et.all. TOEFL iBT Prep Plus 2020-2021. New York: Kaplan Publishing, 2019. Teks.