Gaya APA
Riyanto, S.
(2011).
SPEAK ENGLISH, PLEASE
(
Cet. 3)
.
YOGYAKARTA:
Pustaka Pelajar.
Gaya MLA
Riyanto, Slamet.
"SPEAK ENGLISH, PLEASE".
Cet. 3
YOGYAKARTA:
Pustaka Pelajar,
2011.
Text.