Gaya APA
Langan, John. (2001).
English skills (Ed. 7).
New York:
McGraw-Hill.
Gaya Chicago
Langan, John.
English skills.
Ed. 7
New York:
McGraw-Hill,
2001.
Text.
Gaya MLA
Langan, John.
English skills.
Ed. 7
New York:
McGraw-Hill,
2001.
Text.
Gaya Turabian
Langan, John.
English skills.
Ed. 7
New York:
McGraw-Hill,
2001.
Print.