Gaya APA
Azar, B, S.
(1992).
Understanding and using english grammar
(
Cet.1)
.
Jakarta:
Binarupa Aksara.
Gaya MLA
Azar, Betty, Schrampfer.
"Understanding and using english grammar".
Cet.1
Jakarta:
Binarupa Aksara,
1992.
Monograf.