Gaya APA
Riyanto, S, ;. (2010).
Essentials of English Grammar for Fluent English / Slamet Riyanto (1).
Yogyakarta ::
PUSTAKA PELAJAR,.
Gaya MLA
Riyanto, Slamet, ;.
"Essentials of English Grammar for Fluent English / Slamet Riyanto".
1
Yogyakarta ::
PUSTAKA PELAJAR,,
2010.
.