APA (7th ed.) Citation

Azar, B. S., Kosh, R. S., & Hagen, S. A. (2009). Understanding and using English grammar (Fourth edition.). Pearson Education.

Chicago Style (17th ed.) Citation

Azar, Betty Schrampfer, Rachel Spack Kosh, and Stacy A. Hagen. Understanding and Using English Grammar. Fourth edition. United States: Pearson Education, 2009.

MLA (8th ed.) Citation

Azar, Betty Schrampfer, et al. Understanding and Using English Grammar. Fourth edition. Pearson Education, 2009.