Gaya APA
PORA, Y.
(2003).
Develop your vocabulary grammar and indiom :..
.
Yogyakarta:
Pustaka Pelajar.
Gaya MLA
PORA, YUSRAN.
"Develop your vocabulary grammar and indiom :..".
Yogyakarta:
Pustaka Pelajar,
2003.
Text.