APA Style

Azar, Betty Schrampfer, Hagen, Stacy A.. (2009). Understanding and Using English Grammar. 4th Edition. CD 2. Chapters 12-20 (4th Edition). New York: Pearson Education, Inc..

Chicago Style

Azar, Betty Schrampfer, Hagen, Stacy A.. Understanding and Using English Grammar. 4th Edition. CD 2. Chapters 12-20. 4th Edition New York: Pearson Education, Inc., 2009. Text.

MLA Style

Azar, Betty Schrampfer, Hagen, Stacy A.. Understanding and Using English Grammar. 4th Edition. CD 2. Chapters 12-20. 4th Edition New York: Pearson Education, Inc., 2009. Text.

Turabian Style

Azar, Betty Schrampfer, Hagen, Stacy A.. Understanding and Using English Grammar. 4th Edition. CD 2. Chapters 12-20. 4th Edition New York: Pearson Education, Inc., 2009. Print.