Gaya APA
Suwarsito, H, M., Baehaqi, I.
(2011).
Practical English Grammar
.
Yogyakarta:
Pustaka Pelajar.
Gaya MLA
Suwarsito, Hindayati, Mustafidah,., Baehaqi, Imam.
"Practical English Grammar".
Yogyakarta:
Pustaka Pelajar,
2011.
Text.