Gaya APA

Huda, Z, A., Enha, . (2017). Ultimate Edition TOEFL: fokus pendalaman materi dan soal (Cet. 1). Surabaya: Genta Group Production.

Gaya MLA

Huda, Zin-giber, Al., Enha, . "Ultimate Edition TOEFL: fokus pendalaman materi dan soal". Cet. 1 Surabaya: Genta Group Production, 2017. Text.