Gaya APA
Azar, B, S.
().
Understanding and Using English Grammar
(
cet. 2)
.
jakarta:
Karisma Inti Ilmu.
Gaya MLA
Azar, Betty, Schrampfer.
"Understanding and Using English Grammar".
cet. 2
jakarta:
Karisma Inti Ilmu,
.
Buku.