Gaya APA
Langan, John. (2006).
English Skills (Ed.9).
New York:
McGraw Hill.
Gaya Chicago
Langan, John.
English Skills.
Ed.9
New York:
McGraw Hill,
2006.
Buku Tercetak.
Gaya MLA
Langan, John.
English Skills.
Ed.9
New York:
McGraw Hill,
2006.
Buku Tercetak.
Gaya Turabian
Langan, John.
English Skills.
Ed.9
New York:
McGraw Hill,
2006.
Buku Tercetak.