Gaya APA
Sudarwati, ., Grace, E. (2006).
Look Ahead :An English Course For Senior High School Student Year X .
Jakarta:
ERLANGGA.
Gaya MLA
Sudarwati, ., Grace, Eudia.
"Look Ahead :An English Course For Senior High School Student Year X".
Jakarta:
ERLANGGA,
2006.
Text.