APA Style

Hidayati, N, N. (2015). IELTS preparation: lets get the highest score for IELTS [Book] . Yogyakarta: Pustaka Baru Press.

MLA Style

Hidayati, Niswatin, Nurul. "IELTS preparation: lets get the highest score for IELTS [Book]". Yogyakarta: Pustaka Baru Press, 2015. Book + Audio CD.