Gaya APA
HARTANTO, B. (2007).
PROGRESS : A Contextual Approach To Learning English An English Textbook For Senior High School .
JAKARTA:
GANECA EXACT.
Gaya MLA
HARTANTO, BUDI.
"PROGRESS : A Contextual Approach To Learning English An English Textbook For Senior High School".
JAKARTA:
GANECA EXACT,
2007.
Text.