Gaya APA

Zumakhsin, ., Mufarichah,Yulia, . (2007). Progress A Contextual Approach To Learning English An English Textbook For Senior High School Grade XI . Jakarta: Ganeca Exact.

Gaya MLA

Zumakhsin, ., Mufarichah,Yulia, . "Progress A Contextual Approach To Learning English An English Textbook For Senior High School Grade XI". Jakarta: Ganeca Exact, 2007. Text.