Gaya APA

Fitrini, E., Sumiratingratri, R. (2009). I Speak English (Cet. 1). : Cahaya Pustaka Raga.

Gaya MLA

Fitrini, Erna., Sumiratingratri, Ratih. "I Speak English". Cet. 1 : Cahaya Pustaka Raga, 2009. Text.