APA Citation

Azar, B. S., & Hagen, S. A. (2009). Understanding and using English grammar: With answer key (4th ed. [International edition].). White Plains, NY: Pearson Longman.

Chicago Style Citation

Azar, Betty Schrampfer, and Stacy A. Hagen. Understanding and Using English Grammar: With Answer Key. 4th ed. [International edition]. White Plains, NY: Pearson Longman, 2009.

MLA Citation

Azar, Betty Schrampfer, and Stacy A. Hagen. Understanding and Using English Grammar: With Answer Key. 4th ed. [International edition]. White Plains, NY: Pearson Longman, 2009.

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