Gaya APA
Widjaja, G. (2015).
Complete English Grammar and the Exercises [Part 1 & II] (Cet. 11.--).
Jakarta:
Bhuana Ilmu Populer.
Gaya MLA
Widjaja, Grace.
"Complete English Grammar and the Exercises [Part 1 & II]".
Cet. 11.--
Jakarta:
Bhuana Ilmu Populer,
2015.
Text.