Gaya APA
Look ahead an english course for senior high school students year X. (2007).
Malang:
Erlangga.
Gaya Chicago
Look ahead an english course for senior high school students year X.
.
Malang:
Erlangga,
2007.
Text.
Gaya MLA
Look ahead an english course for senior high school students year X.
.
Malang:
Erlangga,
2007.
Text.
Gaya Turabian
Look ahead an english course for senior high school students year X.
Malang:
Erlangga,
2007.
Print.