Gaya APA
Riyanto, S.
(2009).
English for your better future speak english, please 2
.
Yogyakarta:
Pustaka Pelajar.
Gaya MLA
Riyanto, Slamet.
"English for your better future speak english, please 2".
Yogyakarta:
Pustaka Pelajar,
2009.
Text.