Gaya APA
Alter, J. B.. (1991).
Essential english usage and grammar 4 .
Singapoe:
Binarupa Aksara.
Gaya Chicago
Alter, J. B..
Essential english usage and grammar 4.
Singapoe:
Binarupa Aksara,
1991.
Text.
Gaya MLA
Alter, J. B..
Essential english usage and grammar 4.
Singapoe:
Binarupa Aksara,
1991.
Text.
Gaya Turabian
Alter, J. B..
Essential english usage and grammar 4.
Singapoe:
Binarupa Aksara,
1991.
Print.