Gaya APA

hidayati, N, N. (2015). IELTS Preparation (-). Yogyakarta: Pustaka Baru Press, Yogyakarta.

Gaya MLA

hidayati, Niswatin, Nurul. "IELTS Preparation". - Yogyakarta: Pustaka Baru Press, Yogyakarta, 2015. Text.