Gaya APA

Baehaqi, I., Qudsy, S, Z. (2013). Let's speak English (cet.ke-2). Yogyakarta: Pustaka Pelajar.

Gaya MLA

Baehaqi, Imam., Qudsy, Saifuddin, Zuhri. "Let's speak English". cet.ke-2 Yogyakarta: Pustaka Pelajar, 2013. Text.