Gaya APA
Riyanto, S.
(2010).
Essentials of English Grammar For Fluent English
(
Cet 1)
.
Yogyakarta:
Pustaka Pelajar.
Gaya MLA
Riyanto, Slamet.
"Essentials of English Grammar For Fluent English".
Cet 1
Yogyakarta:
Pustaka Pelajar,
2010.
Text.