Gaya APA
Azar, B, S. (1993).
Understanding and Using English Grammar : Inggris-Indonesia Ed., 2nd Ed. (2).
:
Binarupa Aksara.
Gaya MLA
Azar, Betty, Schrampfer.
"Understanding and Using English Grammar : Inggris-Indonesia Ed., 2nd Ed.".
2
:
Binarupa Aksara,
1993.
Academic.