APA (7th ed.) Citation

AZAR, B. S. Understanding and Using English Grammar. Longman.

Chicago Style (17th ed.) Citation

AZAR, Betty Schrampfer. Understanding and Using English Grammar. Longman.

MLA (8th ed.) Citation

AZAR, Betty Schrampfer. Understanding and Using English Grammar. Longman.

Warning: These citations may not always be 100% accurate.