Gaya APA

Training, I, O, E, L. (2013). Buku Pintar IELTS (International English Language Testing System) / Institute Of English Language Training . Yogyakarta :: B First,.

Gaya MLA

Training, Institute, Of, English, Language. "Buku Pintar IELTS (International English Language Testing System) / Institute Of English Language Training". Yogyakarta :: B First,, 2013. Text.