Gaya APA
Understanding and Using English Grammar. (1999).
New York:
Longman.
Gaya Chicago
Understanding and Using English Grammar.
Third Edition.
New York:
Longman,
1999.
Buku.
Gaya MLA
Understanding and Using English Grammar.
Third Edition.
New York:
Longman,
1999.
Buku.
Gaya Turabian
Understanding and Using English Grammar.
New York:
Longman,
1999.
Buku.