Gaya APA
Azar, Betty schrampfer. (1989).
Understanding and Using English Grammar (1).
America:
Prentice hall regents.
Gaya Chicago
Azar, Betty schrampfer.
Understanding and Using English Grammar.
1
America:
Prentice hall regents,
1989.
Text.
Gaya MLA
Azar, Betty schrampfer.
Understanding and Using English Grammar.
1
America:
Prentice hall regents,
1989.
Text.
Gaya Turabian
Azar, Betty schrampfer.
Understanding and Using English Grammar.
1
America:
Prentice hall regents,
1989.
Print.