Gaya APA
Azar, B, S.
(1993).
Understanding and Using English Grammar
(
Edisi :2)
.
Jakarta:
Banirupa Aksara.
Gaya MLA
Azar, Betty, Schrampfer.
"Understanding and Using English Grammar".
Edisi :2
Jakarta:
Banirupa Aksara,
1993.
Text.