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