Gaya APA
Azar, B, S. (1989).
Understanding And Using English Grammar (2).
New Jersey:
Prentice-Hall,Inc,, Englewood Cliffs.
Gaya MLA
Azar, Betty, Schrampfer.
"Understanding And Using English Grammar".
2
New Jersey:
Prentice-Hall,Inc,, Englewood Cliffs,
1989.
Text.