Gaya APA

Rooy, R, D., Gunawan, G. (2007). Prepare For Ielts Skills And Strategies Book one Listening And Speaking . Jakarta: Gramedia Pustaka Utama.

Gaya MLA

Rooy, Rae, De., Gunawan, Ganiadi. "Prepare For Ielts Skills And Strategies Book one Listening And Speaking". Jakarta: Gramedia Pustaka Utama, 2007. Text.