Gaya APA
Riyanto, S. et al (2017).
A Handbook of English Grammar : an Effective Way to Master English .
Yogyakarta:
Pustaka Pelajar.
Gaya MLA
Riyanto, Slamet. et al.
"A Handbook of English Grammar : an Effective Way to Master English".
Yogyakarta:
Pustaka Pelajar,
2017.
Text.