Gaya APA
Sudarwati, ., Grace, E. (2005).
Look Ahead 1 : An English Course for Senior High School Students Year X .
Jakarta:
Erlangga.
Gaya MLA
Sudarwati, ., Grace, Eudia.
"Look Ahead 1 : An English Course for Senior High School Students Year X".
Jakarta:
Erlangga,
2005.
Text.