Gaya APA

Hidayati, N, N., Rizka, H. (2015). IELTS Preparation: let's get the highest score for ielts . Yogyakarta, Indonesia: Pustaka Baru Press.

Gaya MLA

Hidayati, Niswatin, Nurul., Rizka, Haira. "IELTS Preparation: let's get the highest score for ielts". Yogyakarta, Indonesia: Pustaka Baru Press, 2015. Text.