Gaya APA

Nihayah, N, N, H, J, H, P, D, H. (). Top Strategy Ielts Preparation . : Gramedia.

Gaya MLA

Nihayah, Niswatin, Nurul, Hidayati,, Joko, Hadi, Purnomo,, Dewi, Hidayatun. "Top Strategy Ielts Preparation". : Gramedia, . Text.