Gaya APA

Sumiratingratri, E, F. (2010). I Speak English (Cet. 2). Jakarta: Cahaya Pustaka Raga.

Gaya MLA

Sumiratingratri, Erna, Fitriani-Ratih. "I Speak English". Cet. 2 Jakarta: Cahaya Pustaka Raga, 2010. Text.