Gaya APA
riyanto, S.
(2009).
A Complete Grammar For Toefl Preparation
(
Cet-1)
.
yogyakarta:
Pustaka Jaya.
Gaya MLA
riyanto, Slamet.
"A Complete Grammar For Toefl Preparation".
Cet-1
yogyakarta:
Pustaka Jaya,
2009.
Text.