Gaya APA
Azar, Betty Schrampfer. (1989).
Understanding and using English grammar (Edisi Kedua).
New Jersey:
Prentice Hall.
Gaya Chicago
Azar, Betty Schrampfer.
Understanding and using English grammar.
Edisi Kedua
New Jersey:
Prentice Hall,
1989.
Text.
Gaya MLA
Azar, Betty Schrampfer.
Understanding and using English grammar.
Edisi Kedua
New Jersey:
Prentice Hall,
1989.
Text.
Gaya Turabian
Azar, Betty Schrampfer.
Understanding and using English grammar.
Edisi Kedua
New Jersey:
Prentice Hall,
1989.
Print.