Gaya APA
Azar, B, S. (2000).
Understanding and using english grammar: workbook volume b .
New York:
New York: Longman, 2000.
Gaya MLA
Azar, Betty, Schrampfer.
"Understanding and using english grammar: workbook volume b".
New York:
New York: Longman, 2000,
2000.
.