Gaya APA
Schrampfer, A., B. (1998).
Understanding and using English Grammar. Third Edition (Ed.ke-3).
New York:
Longman.
Gaya MLA
Azar, Betty, Schrampfer.
"Understanding and using English Grammar. Third Edition".
Ed.ke-3
New York:
Longman,
1998.
Textbook.