Azar, B. S., & Hagen, S. A. (2009). Understanding and using english grammar (4th ed.). Pearson.
Chicago Style (17th ed.) CitationAzar, Betty S., and Stacy A. Hagen. Understanding and Using English Grammar. 4th ed. New York: Pearson, 2009.
MLA (9th ed.) CitationAzar, Betty S., and Stacy A. Hagen. Understanding and Using English Grammar. 4th ed. Pearson, 2009.
Warning: These citations may not always be 100% accurate.