Gaya APA
RIYANTO, S. (2010).
Essentials of English Grammar for Fluent English Book One (1).
Yogyakarta:
Pustaka Pelajar.
Gaya MLA
RIYANTO, SLAMET.
"Essentials of English Grammar for Fluent English Book One".
1
Yogyakarta:
Pustaka Pelajar,
2010.
Text.