Gaya APA
Azar, Betty Schrampfer. (2006).
Basic english grammar : with answer key, 3rd Ed. (ed.3).
Medan:
Pearson Longman.
Gaya Chicago
Azar, Betty Schrampfer.
Basic english grammar : with answer key, 3rd Ed..
ed.3
Medan:
Pearson Longman,
2006.
SASTRA.
Gaya MLA
Azar, Betty Schrampfer.
Basic english grammar : with answer key, 3rd Ed..
ed.3
Medan:
Pearson Longman,
2006.
SASTRA.
Gaya Turabian
Azar, Betty Schrampfer.
Basic english grammar : with answer key, 3rd Ed..
ed.3
Medan:
Pearson Longman,
2006.
SASTRA.