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.