Gaya APA
Th.M.Sudarwati, . et al (2007).
Look Ahead Book 2: An English Course for Senior High School Students Year XI .
Jakarta:
Erlangga.
Gaya MLA
Th.M.Sudarwati, . et al.
"Look Ahead Book 2: An English Course for Senior High School Students Year XI".
Jakarta:
Erlangga,
2007.
Book.