Gaya APA
Azhar, A, A, D, S.
(2018).
Understanding English Structure
.
Yogyakarta:
Pustaka Pelajar.
Gaya MLA
Azhar, Azhar, Arsyad, Dan, Sophia.
"Understanding English Structure".
Yogyakarta:
Pustaka Pelajar,
2018.
Text.