Gaya APA

Azar, B, S. (1999). Understanding and using English Grammar : Betty Schramfer Azar (Ed. 3). New York: Longman.

Gaya MLA

Azar, Betty, Schrampfer. "Understanding and using English Grammar : Betty Schramfer Azar". Ed. 3 New York: Longman, 1999. Buku.