Gaya APA
Azar, B, S.
(1992).
Fundamental of English Grammer
(
Ed.2th)
.
:
Regents/Prentice Hall .
Gaya MLA
Azar, Betty, Schrampfer.
"Fundamental of English Grammer".
Ed.2th
:
Regents/Prentice Hall ,
1992.
Referensi.