Gaya APA
Azar. (1998).
Understanding and using english grammar. third edition .
American:
longman.
Gaya Chicago
Azar.
Understanding and using english grammar. third edition.
American:
longman,
1998.
Text.
Gaya MLA
Azar.
Understanding and using english grammar. third edition.
American:
longman,
1998.
Text.
Gaya Turabian
Azar.
Understanding and using english grammar. third edition.
American:
longman,
1998.
Print.