Gaya APA
Sumiratiningratri, E, F, D, R.
(2017).
I Speak English
.
jakarta:
Cahaya Pustaka Raga.
Gaya MLA
Sumiratiningratri, Erna, Fitrini, Dan, Ratih.
"I Speak English".
jakarta:
Cahaya Pustaka Raga,
2017.
Text.