Gaya APA
Azar, Betty Schrampfer. (1998).
Understanding and using english grammar : third edition (Edisi ke 3).
New York:
Longman.
Gaya Chicago
Azar, Betty Schrampfer.
Understanding and using english grammar : third edition.
Edisi ke 3
New York:
Longman,
1998.
Text.
Gaya MLA
Azar, Betty Schrampfer.
Understanding and using english grammar : third edition.
Edisi ke 3
New York:
Longman,
1998.
Text.
Gaya Turabian
Azar, Betty Schrampfer.
Understanding and using english grammar : third edition.
Edisi ke 3
New York:
Longman,
1998.
Print.