Gaya APA

Hidayat, N, N. (2015). IELTS Preparation lets get the highest score for IELTS . Yogyakarta: PUSTAKA BARU PRESS.

Gaya MLA

Hidayat, Niswatin, Nurul. "IELTS Preparation lets get the highest score for IELTS". Yogyakarta: PUSTAKA BARU PRESS, 2015. Text.