APA (7th ed.) Citation

Azar, B. S., & Hagen, S. A. (2009). Understanding and using english grammar (Fourth edition.). Pearson.

Chicago Style (17th ed.) Citation

Azar, Betty Schrampfer, and Stacy A.66162 Hagen. Understanding and Using English Grammar. Fourth edition. New York: Pearson, 2009.

MLA (9th ed.) Citation

Azar, Betty Schrampfer, and Stacy A.66162 Hagen. Understanding and Using English Grammar. Fourth edition. Pearson, 2009.

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