Gaya APA
Understanding and using English grammar. (1989).
New Jersey:
Prentice Hall Regents.
Gaya Chicago
Understanding and using English grammar.
2nd.
New Jersey:
Prentice Hall Regents,
1989.
Buku.
Gaya MLA
Understanding and using English grammar.
2nd.
New Jersey:
Prentice Hall Regents,
1989.
Buku.
Gaya Turabian
Understanding and using English grammar.
New Jersey:
Prentice Hall Regents,
1989.
Buku.