Gaya APA
Th.M.Sudarwati,dkk, . (2007).
Look Ahead 1 An English Course For Senior High School Students Year X .
Jakarta:
Erlangga.
Gaya MLA
Th.M.Sudarwati,dkk, .
"Look Ahead 1 An English Course For Senior High School Students Year X".
Jakarta:
Erlangga,
2007.
Text.