Gaya APA

Zumakhsin, ., Mufarichah, Y. (2007). Progress A Contextual Approach to Leaning English An English Textbook for Senior High School XI IPA & IPS Program . Jakarta: Ganeca Exact.

Gaya MLA

Zumakhsin, ., Mufarichah, Yulia. "Progress A Contextual Approach to Leaning English An English Textbook for Senior High School XI IPA & IPS Program". Jakarta: Ganeca Exact, 2007. Text.