Gaya APA
Grace, E., sudarwati, M. (2007).
Look Ahead an English Course for Senior High School Students Year XII 3 .
Jakarta:
Erlangga.
Gaya MLA
Grace, Eudia., sudarwati, M..
"Look Ahead an English Course for Senior High School Students Year XII 3".
Jakarta:
Erlangga,
2007.
Buku Paket.