Gaya APA
Th.M.Sudarwati,dkk, . (2007).
Look Ahead 2 An English Course For Senior High School Students Year XI .
Jakarta:
Erlangga.
Gaya MLA
Th.M.Sudarwati,dkk, .
"Look Ahead 2 An English Course For Senior High School Students Year XI".
Jakarta:
Erlangga,
2007.
Text.