Gaya APA
AZAR, B, S., McCORMICK, A, [. (2006).
Understanding and using english grammar (erd 3d.).
Whidbey Island:
Pearson Longman.
Gaya MLA
AZAR, Betty, Schrampfer., McCORMICK, Amy, [ed.].
"Understanding and using english grammar".
erd 3d.
Whidbey Island:
Pearson Longman,
2006.
Buku.