Gaya APA
Zumakhsin, ., Mufarichah, Y. (2007).
Progress A Contextual Approach to Learning English Grade XI .
jakarta:
ganeca.
Gaya MLA
Zumakhsin, ., Mufarichah, Yulia.
"Progress A Contextual Approach to Learning English Grade XI".
jakarta:
ganeca,
2007.
Art Original.