Gaya APA

Zumakhsin, ., Mufarichah,Yulia, . (2007). Progress A Contextual Approach to Learning English for Grade XII IPA & IPS Program . Jakarta: Ganeca Exact.

Gaya MLA

Zumakhsin, ., Mufarichah,Yulia, . "Progress A Contextual Approach to Learning English for Grade XII IPA & IPS Program". Jakarta: Ganeca Exact, 2007. Text.