Gaya APA
Sudarwati, T, M., Valentina, A. (2010).
Look ahead an english course for senior high school year x (Edisi I).
Jakarta:
PENERBIT ERLANGGA.
Gaya MLA
Sudarwati, Th., M.., Valentina, Anna.
"Look ahead an english course for senior high school year x".
Edisi I
Jakarta:
PENERBIT ERLANGGA,
2010.
Text.